20977840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{877}}^1$

素因数の和:926

約数の個数: 80

約数和(自身を含む): 54871488

約数和(自身を除く): 33893648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 877, 920, 1040, 1196, 1495, 1754, 1840, 2392, 2990, 3508, 4385, 4784, 5980, 7016, 8770, 11401, 11960, 14032, 17540, 20171, 22802, 23920, 35080, 40342, 45604, 57005, 70160, 80684, 91208, 100855, 114010, 161368, 182416, 201710, 228020, 262223, 322736, 403420, 456040, 524446, 806840, 912080, 1048892, 1311115, 1613680, 2097784, 2622230, 4195568, 5244460, 10488920, 20977840]

約数ペア:

[(1, 20977840), (2, 10488920), (4, 5244460), (5, 4195568), (8, 2622230), (10, 2097784), (13, 1613680), (16, 1311115), (20, 1048892), (23, 912080), (26, 806840), (40, 524446), (46, 456040), (52, 403420), (65, 322736), (80, 262223), (92, 228020), (104, 201710), (115, 182416), (130, 161368), (184, 114010), (208, 100855), (230, 91208), (260, 80684), (299, 70160), (368, 57005), (460, 45604), (520, 40342), (598, 35080), (877, 23920), (920, 22802), (1040, 20171), (1196, 17540), (1495, 14032), (1754, 11960), (1840, 11401), (2392, 8770), (2990, 7016), (3508, 5980), (4385, 4784)]