20293780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{877}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 46463760

約数和(自身を除く): 26169980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 877, 890, 1157, 1754, 1780, 2314, 3508, 4385, 4628, 5785, 8770, 11401, 11570, 17540, 22802, 23140, 45604, 57005, 78053, 114010, 156106, 228020, 312212, 390265, 780530, 1014689, 1561060, 2029378, 4058756, 5073445, 10146890, 20293780]

約数ペア:

[(1, 20293780), (2, 10146890), (4, 5073445), (5, 4058756), (10, 2029378), (13, 1561060), (20, 1014689), (26, 780530), (52, 390265), (65, 312212), (89, 228020), (130, 156106), (178, 114010), (260, 78053), (356, 57005), (445, 45604), (877, 23140), (890, 22802), (1157, 17540), (1754, 11570), (1780, 11401), (2314, 8770), (3508, 5785), (4385, 4628)]