21000201680

素因数分解:

$2^4\times 5^1\times {\mathrm{8693}}^1\times {\mathrm{30197}}^1$

素因数の和:38903

約数の個数: 40

約数和(自身を含む): 48832702632

約数和(自身を除く): 27832500952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8693, 17386, 30197, 34772, 43465, 60394, 69544, 86930, 120788, 139088, 150985, 173860, 241576, 301970, 347720, 483152, 603940, 695440, 1207880, 2415760, 262502521, 525005042, 1050010084, 1312512605, 2100020168, 2625025210, 4200040336, 5250050420, 10500100840, 21000201680]

約数ペア:

[(1, 21000201680), (2, 10500100840), (4, 5250050420), (5, 4200040336), (8, 2625025210), (10, 2100020168), (16, 1312512605), (20, 1050010084), (40, 525005042), (80, 262502521), (8693, 2415760), (17386, 1207880), (30197, 695440), (34772, 603940), (43465, 483152), (60394, 347720), (69544, 301970), (86930, 241576), (120788, 173860), (139088, 150985)]