20391200

素因数分解:

$2^5\times 5^2\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:450

約数の個数: 72

約数和(自身を含む): 50621760

約数和(自身を除く): 30230560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 71, 80, 100, 142, 160, 200, 284, 355, 359, 400, 568, 710, 718, 800, 1136, 1420, 1436, 1775, 1795, 2272, 2840, 2872, 3550, 3590, 5680, 5744, 7100, 7180, 8975, 11360, 11488, 14200, 14360, 17950, 25489, 28400, 28720, 35900, 50978, 56800, 57440, 71800, 101956, 127445, 143600, 203912, 254890, 287200, 407824, 509780, 637225, 815648, 1019560, 1274450, 2039120, 2548900, 4078240, 5097800, 10195600, 20391200]

約数ペア:

[(1, 20391200), (2, 10195600), (4, 5097800), (5, 4078240), (8, 2548900), (10, 2039120), (16, 1274450), (20, 1019560), (25, 815648), (32, 637225), (40, 509780), (50, 407824), (71, 287200), (80, 254890), (100, 203912), (142, 143600), (160, 127445), (200, 101956), (284, 71800), (355, 57440), (359, 56800), (400, 50978), (568, 35900), (710, 28720), (718, 28400), (800, 25489), (1136, 17950), (1420, 14360), (1436, 14200), (1775, 11488), (1795, 11360), (2272, 8975), (2840, 7180), (2872, 7100), (3550, 5744), (3590, 5680)]