20649920

素因数分解:

$2^6\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1373}}^1$

素因数の和:1437

約数の個数: 56

約数和(自身を含む): 50255424

約数和(自身を除く): 29605504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 94, 160, 188, 235, 320, 376, 470, 752, 940, 1373, 1504, 1880, 2746, 3008, 3760, 5492, 6865, 7520, 10984, 13730, 15040, 21968, 27460, 43936, 54920, 64531, 87872, 109840, 129062, 219680, 258124, 322655, 439360, 516248, 645310, 1032496, 1290620, 2064992, 2581240, 4129984, 5162480, 10324960, 20649920]

約数ペア:

[(1, 20649920), (2, 10324960), (4, 5162480), (5, 4129984), (8, 2581240), (10, 2064992), (16, 1290620), (20, 1032496), (32, 645310), (40, 516248), (47, 439360), (64, 322655), (80, 258124), (94, 219680), (160, 129062), (188, 109840), (235, 87872), (320, 64531), (376, 54920), (470, 43936), (752, 27460), (940, 21968), (1373, 15040), (1504, 13730), (1880, 10984), (2746, 7520), (3008, 6865), (3760, 5492)]