20389616

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1607}}^1$

素因数の和:1689

約数の個数: 40

約数和(自身を含む): 43268064

約数和(自身を除く): 22878448

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 61, 104, 122, 208, 244, 488, 793, 976, 1586, 1607, 3172, 3214, 6344, 6428, 12688, 12856, 20891, 25712, 41782, 83564, 98027, 167128, 196054, 334256, 392108, 784216, 1274351, 1568432, 2548702, 5097404, 10194808, 20389616]

約数ペア:

[(1, 20389616), (2, 10194808), (4, 5097404), (8, 2548702), (13, 1568432), (16, 1274351), (26, 784216), (52, 392108), (61, 334256), (104, 196054), (122, 167128), (208, 98027), (244, 83564), (488, 41782), (793, 25712), (976, 20891), (1586, 12856), (1607, 12688), (3172, 6428), (3214, 6344)]