20992240

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4951}}^1$

素因数の和:5017

約数の個数: 40

約数和(自身を含む): 49737888

約数和(自身を除く): 28745648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4951, 9902, 19804, 24755, 39608, 49510, 79216, 99020, 198040, 262403, 396080, 524806, 1049612, 1312015, 2099224, 2624030, 4198448, 5248060, 10496120, 20992240]

約数ペア:

[(1, 20992240), (2, 10496120), (4, 5248060), (5, 4198448), (8, 2624030), (10, 2099224), (16, 1312015), (20, 1049612), (40, 524806), (53, 396080), (80, 262403), (106, 198040), (212, 99020), (265, 79216), (424, 49510), (530, 39608), (848, 24755), (1060, 19804), (2120, 9902), (4240, 4951)]