19798020

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{101}}^1$

素因数の和:144

約数の個数: 180

約数和(自身を含む): 68942412

約数和(自身を除く): 49144392

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 33, 36, 44, 45, 54, 55, 60, 66, 81, 90, 99, 101, 108, 110, 121, 132, 135, 162, 165, 180, 198, 202, 220, 242, 270, 297, 303, 324, 330, 363, 396, 404, 405, 484, 495, 505, 540, 594, 605, 606, 660, 726, 810, 891, 909, 990, 1010, 1089, 1111, 1188, 1210, 1212, 1452, 1485, 1515, 1620, 1782, 1815, 1818, 1980, 2020, 2178, 2222, 2420, 2727, 2970, 3030, 3267, 3333, 3564, 3630, 3636, 4356, 4444, 4455, 4545, 5445, 5454, 5555, 5940, 6060, 6534, 6666, 7260, 8181, 8910, 9090, 9801, 9999, 10890, 10908, 11110, 12221, 13068, 13332, 13635, 16335, 16362, 16665, 17820, 18180, 19602, 19998, 21780, 22220, 24442, 27270, 29997, 32670, 32724, 33330, 36663, 39204, 39996, 40905, 48884, 49005, 49995, 54540, 59994, 61105, 65340, 66660, 73326, 81810, 89991, 98010, 99990, 109989, 119988, 122210, 146652, 149985, 163620, 179982, 183315, 196020, 199980, 219978, 244420, 299970, 329967, 359964, 366630, 439956, 449955, 549945, 599940, 659934, 733260, 899910, 989901, 1099890, 1319868, 1649835, 1799820, 1979802, 2199780, 3299670, 3959604, 4949505, 6599340, 9899010, 19798020]

約数ペア:

[(1, 19798020), (2, 9899010), (3, 6599340), (4, 4949505), (5, 3959604), (6, 3299670), (9, 2199780), (10, 1979802), (11, 1799820), (12, 1649835), (15, 1319868), (18, 1099890), (20, 989901), (22, 899910), (27, 733260), (30, 659934), (33, 599940), (36, 549945), (44, 449955), (45, 439956), (54, 366630), (55, 359964), (60, 329967), (66, 299970), (81, 244420), (90, 219978), (99, 199980), (101, 196020), (108, 183315), (110, 179982), (121, 163620), (132, 149985), (135, 146652), (162, 122210), (165, 119988), (180, 109989), (198, 99990), (202, 98010), (220, 89991), (242, 81810), (270, 73326), (297, 66660), (303, 65340), (324, 61105), (330, 59994), (363, 54540), (396, 49995), (404, 49005), (405, 48884), (484, 40905), (495, 39996), (505, 39204), (540, 36663), (594, 33330), (605, 32724), (606, 32670), (660, 29997), (726, 27270), (810, 24442), (891, 22220), (909, 21780), (990, 19998), (1010, 19602), (1089, 18180), (1111, 17820), (1188, 16665), (1210, 16362), (1212, 16335), (1452, 13635), (1485, 13332), (1515, 13068), (1620, 12221), (1782, 11110), (1815, 10908), (1818, 10890), (1980, 9999), (2020, 9801), (2178, 9090), (2222, 8910), (2420, 8181), (2727, 7260), (2970, 6666), (3030, 6534), (3267, 6060), (3333, 5940), (3564, 5555), (3630, 5454), (3636, 5445), (4356, 4545), (4444, 4455)]