21645540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{419}}^1$

素因数の和:482

約数の個数: 144

約数和(自身を含む): 77051520

約数和(自身を除く): 55405980

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 41, 42, 45, 60, 63, 70, 82, 84, 90, 105, 123, 126, 140, 164, 180, 205, 210, 246, 252, 287, 315, 369, 410, 419, 420, 492, 574, 615, 630, 738, 820, 838, 861, 1148, 1230, 1257, 1260, 1435, 1476, 1676, 1722, 1845, 2095, 2460, 2514, 2583, 2870, 2933, 3444, 3690, 3771, 4190, 4305, 5028, 5166, 5740, 5866, 6285, 7380, 7542, 8380, 8610, 8799, 10332, 11732, 12570, 12915, 14665, 15084, 17179, 17220, 17598, 18855, 25140, 25830, 26397, 29330, 34358, 35196, 37710, 43995, 51537, 51660, 52794, 58660, 68716, 75420, 85895, 87990, 103074, 105588, 120253, 131985, 154611, 171790, 175980, 206148, 240506, 257685, 263970, 309222, 343580, 360759, 481012, 515370, 527940, 601265, 618444, 721518, 773055, 1030740, 1082277, 1202530, 1443036, 1546110, 1803795, 2164554, 2405060, 3092220, 3607590, 4329108, 5411385, 7215180, 10822770, 21645540]

約数ペア:

[(1, 21645540), (2, 10822770), (3, 7215180), (4, 5411385), (5, 4329108), (6, 3607590), (7, 3092220), (9, 2405060), (10, 2164554), (12, 1803795), (14, 1546110), (15, 1443036), (18, 1202530), (20, 1082277), (21, 1030740), (28, 773055), (30, 721518), (35, 618444), (36, 601265), (41, 527940), (42, 515370), (45, 481012), (60, 360759), (63, 343580), (70, 309222), (82, 263970), (84, 257685), (90, 240506), (105, 206148), (123, 175980), (126, 171790), (140, 154611), (164, 131985), (180, 120253), (205, 105588), (210, 103074), (246, 87990), (252, 85895), (287, 75420), (315, 68716), (369, 58660), (410, 52794), (419, 51660), (420, 51537), (492, 43995), (574, 37710), (615, 35196), (630, 34358), (738, 29330), (820, 26397), (838, 25830), (861, 25140), (1148, 18855), (1230, 17598), (1257, 17220), (1260, 17179), (1435, 15084), (1476, 14665), (1676, 12915), (1722, 12570), (1845, 11732), (2095, 10332), (2460, 8799), (2514, 8610), (2583, 8380), (2870, 7542), (2933, 7380), (3444, 6285), (3690, 5866), (3771, 5740), (4190, 5166), (4305, 5028)]