21597040

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2621}}^1$

素因数の和:2737

約数の個数: 40

約数和(自身を含む): 50719968

約数和(自身を除く): 29122928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2621, 4120, 5242, 8240, 10484, 13105, 20968, 26210, 41936, 52420, 104840, 209680, 269963, 539926, 1079852, 1349815, 2159704, 2699630, 4319408, 5399260, 10798520, 21597040]

約数ペア:

[(1, 21597040), (2, 10798520), (4, 5399260), (5, 4319408), (8, 2699630), (10, 2159704), (16, 1349815), (20, 1079852), (40, 539926), (80, 269963), (103, 209680), (206, 104840), (412, 52420), (515, 41936), (824, 26210), (1030, 20968), (1648, 13105), (2060, 10484), (2621, 8240), (4120, 5242)]