20697560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{751}}^1$

素因数の和:828

約数の個数: 64

約数和(自身を含む): 51166080

約数和(自身を除く): 30468520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 751, 1060, 1378, 1502, 2120, 2756, 3004, 3445, 3755, 5512, 6008, 6890, 7510, 9763, 13780, 15020, 19526, 27560, 30040, 39052, 39803, 48815, 78104, 79606, 97630, 159212, 195260, 199015, 318424, 390520, 398030, 517439, 796060, 1034878, 1592120, 2069756, 2587195, 4139512, 5174390, 10348780, 20697560]

約数ペア:

[(1, 20697560), (2, 10348780), (4, 5174390), (5, 4139512), (8, 2587195), (10, 2069756), (13, 1592120), (20, 1034878), (26, 796060), (40, 517439), (52, 398030), (53, 390520), (65, 318424), (104, 199015), (106, 195260), (130, 159212), (212, 97630), (260, 79606), (265, 78104), (424, 48815), (520, 39803), (530, 39052), (689, 30040), (751, 27560), (1060, 19526), (1378, 15020), (1502, 13780), (2120, 9763), (2756, 7510), (3004, 6890), (3445, 6008), (3755, 5512)]