20819800

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{2539}}^1$

素因数の和:2596

約数の個数: 48

約数和(自身を含む): 49606200

約数和(自身を除く): 28786400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 164, 200, 205, 328, 410, 820, 1025, 1640, 2050, 2539, 4100, 5078, 8200, 10156, 12695, 20312, 25390, 50780, 63475, 101560, 104099, 126950, 208198, 253900, 416396, 507800, 520495, 832792, 1040990, 2081980, 2602475, 4163960, 5204950, 10409900, 20819800]

約数ペア:

[(1, 20819800), (2, 10409900), (4, 5204950), (5, 4163960), (8, 2602475), (10, 2081980), (20, 1040990), (25, 832792), (40, 520495), (41, 507800), (50, 416396), (82, 253900), (100, 208198), (164, 126950), (200, 104099), (205, 101560), (328, 63475), (410, 50780), (820, 25390), (1025, 20312), (1640, 12695), (2050, 10156), (2539, 8200), (4100, 5078)]