81251000

素因数分解:

$2^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{2621}}^1$

素因数の和:2673

約数の個数: 64

約数和(自身を含む): 196335360

約数和(自身を除く): 115084360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 155, 200, 248, 250, 310, 500, 620, 775, 1000, 1240, 1550, 2621, 3100, 3875, 5242, 6200, 7750, 10484, 13105, 15500, 20968, 26210, 31000, 52420, 65525, 81251, 104840, 131050, 162502, 262100, 325004, 327625, 406255, 524200, 650008, 655250, 812510, 1310500, 1625020, 2031275, 2621000, 3250040, 4062550, 8125100, 10156375, 16250200, 20312750, 40625500, 81251000]

約数ペア:

[(1, 81251000), (2, 40625500), (4, 20312750), (5, 16250200), (8, 10156375), (10, 8125100), (20, 4062550), (25, 3250040), (31, 2621000), (40, 2031275), (50, 1625020), (62, 1310500), (100, 812510), (124, 655250), (125, 650008), (155, 524200), (200, 406255), (248, 327625), (250, 325004), (310, 262100), (500, 162502), (620, 131050), (775, 104840), (1000, 81251), (1240, 65525), (1550, 52420), (2621, 31000), (3100, 26210), (3875, 20968), (5242, 15500), (6200, 13105), (7750, 10484)]