21349700

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 48996864

約数和(自身を除く): 27647164

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 71, 97, 100, 124, 142, 155, 194, 284, 310, 355, 388, 485, 620, 710, 775, 970, 1420, 1550, 1775, 1940, 2201, 2425, 3007, 3100, 3550, 4402, 4850, 6014, 6887, 7100, 8804, 9700, 11005, 12028, 13774, 15035, 22010, 27548, 30070, 34435, 44020, 55025, 60140, 68870, 75175, 110050, 137740, 150350, 172175, 213497, 220100, 300700, 344350, 426994, 688700, 853988, 1067485, 2134970, 4269940, 5337425, 10674850, 21349700]

約数ペア:

[(1, 21349700), (2, 10674850), (4, 5337425), (5, 4269940), (10, 2134970), (20, 1067485), (25, 853988), (31, 688700), (50, 426994), (62, 344350), (71, 300700), (97, 220100), (100, 213497), (124, 172175), (142, 150350), (155, 137740), (194, 110050), (284, 75175), (310, 68870), (355, 60140), (388, 55025), (485, 44020), (620, 34435), (710, 30070), (775, 27548), (970, 22010), (1420, 15035), (1550, 13774), (1775, 12028), (1940, 11005), (2201, 9700), (2425, 8804), (3007, 7100), (3100, 6887), (3550, 6014), (4402, 4850)]