21099920

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3613}}^1$

素因数の和:3699

約数の個数: 40

約数和(自身を含む): 49743096

約数和(自身を除く): 28643176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3613, 5840, 7226, 14452, 18065, 28904, 36130, 57808, 72260, 144520, 263749, 289040, 527498, 1054996, 1318745, 2109992, 2637490, 4219984, 5274980, 10549960, 21099920]

約数ペア:

[(1, 21099920), (2, 10549960), (4, 5274980), (5, 4219984), (8, 2637490), (10, 2109992), (16, 1318745), (20, 1054996), (40, 527498), (73, 289040), (80, 263749), (146, 144520), (292, 72260), (365, 57808), (584, 36130), (730, 28904), (1168, 18065), (1460, 14452), (2920, 7226), (3613, 5840)]