20399728

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{2027}}^1$

素因数の和:2089

約数の個数: 40

約数和(自身を含む): 43001712

約数和(自身を除く): 22601984

約数列:

[1, 2, 4, 8, 16, 17, 34, 37, 68, 74, 136, 148, 272, 296, 592, 629, 1258, 2027, 2516, 4054, 5032, 8108, 10064, 16216, 32432, 34459, 68918, 74999, 137836, 149998, 275672, 299996, 551344, 599992, 1199984, 1274983, 2549966, 5099932, 10199864, 20399728]

約数ペア:

[(1, 20399728), (2, 10199864), (4, 5099932), (8, 2549966), (16, 1274983), (17, 1199984), (34, 599992), (37, 551344), (68, 299996), (74, 275672), (136, 149998), (148, 137836), (272, 74999), (296, 68918), (592, 34459), (629, 32432), (1258, 16216), (2027, 10064), (2516, 8108), (4054, 5032)]