20098540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:479

約数の個数: 96

約数和(自身を含む): 54448128

約数和(自身を除く): 34349588

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 31, 35, 44, 55, 62, 70, 77, 110, 124, 140, 154, 155, 217, 220, 308, 310, 341, 385, 421, 434, 620, 682, 770, 842, 868, 1085, 1364, 1540, 1684, 1705, 2105, 2170, 2387, 2947, 3410, 4210, 4340, 4631, 4774, 5894, 6820, 8420, 9262, 9548, 11788, 11935, 13051, 14735, 18524, 23155, 23870, 26102, 29470, 32417, 46310, 47740, 52204, 58940, 64834, 65255, 91357, 92620, 129668, 130510, 143561, 162085, 182714, 261020, 287122, 324170, 365428, 456785, 574244, 648340, 717805, 913570, 1004927, 1435610, 1827140, 2009854, 2871220, 4019708, 5024635, 10049270, 20098540]

約数ペア:

[(1, 20098540), (2, 10049270), (4, 5024635), (5, 4019708), (7, 2871220), (10, 2009854), (11, 1827140), (14, 1435610), (20, 1004927), (22, 913570), (28, 717805), (31, 648340), (35, 574244), (44, 456785), (55, 365428), (62, 324170), (70, 287122), (77, 261020), (110, 182714), (124, 162085), (140, 143561), (154, 130510), (155, 129668), (217, 92620), (220, 91357), (308, 65255), (310, 64834), (341, 58940), (385, 52204), (421, 47740), (434, 46310), (620, 32417), (682, 29470), (770, 26102), (842, 23870), (868, 23155), (1085, 18524), (1364, 14735), (1540, 13051), (1684, 11935), (1705, 11788), (2105, 9548), (2170, 9262), (2387, 8420), (2947, 6820), (3410, 5894), (4210, 4774), (4340, 4631)]