21718720

素因数分解:

$2^6\times 5^1\times {\mathrm{67}}^1\times {\mathrm{1013}}^1$

素因数の和:1097

約数の個数: 56

約数和(自身を含む): 52541424

約数和(自身を除く): 30822704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 134, 160, 268, 320, 335, 536, 670, 1013, 1072, 1340, 2026, 2144, 2680, 4052, 4288, 5065, 5360, 8104, 10130, 10720, 16208, 20260, 21440, 32416, 40520, 64832, 67871, 81040, 135742, 162080, 271484, 324160, 339355, 542968, 678710, 1085936, 1357420, 2171872, 2714840, 4343744, 5429680, 10859360, 21718720]

約数ペア:

[(1, 21718720), (2, 10859360), (4, 5429680), (5, 4343744), (8, 2714840), (10, 2171872), (16, 1357420), (20, 1085936), (32, 678710), (40, 542968), (64, 339355), (67, 324160), (80, 271484), (134, 162080), (160, 135742), (268, 81040), (320, 67871), (335, 64832), (536, 40520), (670, 32416), (1013, 21440), (1072, 20260), (1340, 16208), (2026, 10720), (2144, 10130), (2680, 8104), (4052, 5360), (4288, 5065)]