21000547720

素因数分解:

$2^3\times 5^1\times {\mathrm{8753}}^1\times {\mathrm{59981}}^1$

素因数の和:68745

約数の個数: 32

約数和(自身を含む): 47257418520

約数和(自身を除く): 26256870800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 8753, 17506, 35012, 43765, 59981, 70024, 87530, 119962, 175060, 239924, 299905, 350120, 479848, 599810, 1199620, 2399240, 525013693, 1050027386, 2100054772, 2625068465, 4200109544, 5250136930, 10500273860, 21000547720]

約数ペア:

[(1, 21000547720), (2, 10500273860), (4, 5250136930), (5, 4200109544), (8, 2625068465), (10, 2100054772), (20, 1050027386), (40, 525013693), (8753, 2399240), (17506, 1199620), (35012, 599810), (43765, 479848), (59981, 350120), (70024, 299905), (87530, 239924), (119962, 175060)]