20465500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{61}}^2$

素因数の和:152

約数の個数: 72

約数和(自身を含む): 49572432

約数和(自身を除く): 29106932

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 61, 100, 110, 122, 125, 220, 244, 250, 275, 305, 500, 550, 610, 671, 1100, 1220, 1342, 1375, 1525, 2684, 2750, 3050, 3355, 3721, 5500, 6100, 6710, 7442, 7625, 13420, 14884, 15250, 16775, 18605, 30500, 33550, 37210, 40931, 67100, 74420, 81862, 83875, 93025, 163724, 167750, 186050, 204655, 335500, 372100, 409310, 465125, 818620, 930250, 1023275, 1860500, 2046550, 4093100, 5116375, 10232750, 20465500]

約数ペア:

[(1, 20465500), (2, 10232750), (4, 5116375), (5, 4093100), (10, 2046550), (11, 1860500), (20, 1023275), (22, 930250), (25, 818620), (44, 465125), (50, 409310), (55, 372100), (61, 335500), (100, 204655), (110, 186050), (122, 167750), (125, 163724), (220, 93025), (244, 83875), (250, 81862), (275, 74420), (305, 67100), (500, 40931), (550, 37210), (610, 33550), (671, 30500), (1100, 18605), (1220, 16775), (1342, 15250), (1375, 14884), (1525, 13420), (2684, 7625), (2750, 7442), (3050, 6710), (3355, 6100), (3721, 5500)]