21990540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{233}}^1$

素因数の和:280

約数の個数: 144

約数和(自身を含む): 73198944

約数和(自身を除く): 51208404

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 15, 20, 22, 26, 30, 33, 39, 44, 52, 55, 60, 65, 66, 78, 110, 121, 130, 132, 143, 156, 165, 195, 220, 233, 242, 260, 286, 330, 363, 390, 429, 466, 484, 572, 605, 660, 699, 715, 726, 780, 858, 932, 1165, 1210, 1398, 1430, 1452, 1573, 1716, 1815, 2145, 2330, 2420, 2563, 2796, 2860, 3029, 3146, 3495, 3630, 4290, 4660, 4719, 5126, 6058, 6292, 6990, 7260, 7689, 7865, 8580, 9087, 9438, 10252, 12116, 12815, 13980, 15145, 15378, 15730, 18174, 18876, 23595, 25630, 28193, 30290, 30756, 31460, 33319, 36348, 38445, 45435, 47190, 51260, 56386, 60580, 66638, 76890, 84579, 90870, 94380, 99957, 112772, 133276, 140965, 153780, 166595, 169158, 181740, 199914, 281930, 333190, 338316, 366509, 399828, 422895, 499785, 563860, 666380, 733018, 845790, 999570, 1099527, 1466036, 1691580, 1832545, 1999140, 2199054, 3665090, 4398108, 5497635, 7330180, 10995270, 21990540]

約数ペア:

[(1, 21990540), (2, 10995270), (3, 7330180), (4, 5497635), (5, 4398108), (6, 3665090), (10, 2199054), (11, 1999140), (12, 1832545), (13, 1691580), (15, 1466036), (20, 1099527), (22, 999570), (26, 845790), (30, 733018), (33, 666380), (39, 563860), (44, 499785), (52, 422895), (55, 399828), (60, 366509), (65, 338316), (66, 333190), (78, 281930), (110, 199914), (121, 181740), (130, 169158), (132, 166595), (143, 153780), (156, 140965), (165, 133276), (195, 112772), (220, 99957), (233, 94380), (242, 90870), (260, 84579), (286, 76890), (330, 66638), (363, 60580), (390, 56386), (429, 51260), (466, 47190), (484, 45435), (572, 38445), (605, 36348), (660, 33319), (699, 31460), (715, 30756), (726, 30290), (780, 28193), (858, 25630), (932, 23595), (1165, 18876), (1210, 18174), (1398, 15730), (1430, 15378), (1452, 15145), (1573, 13980), (1716, 12815), (1815, 12116), (2145, 10252), (2330, 9438), (2420, 9087), (2563, 8580), (2796, 7865), (2860, 7689), (3029, 7260), (3146, 6990), (3495, 6292), (3630, 6058), (4290, 5126), (4660, 4719)]