21917720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{457}}^1$

素因数の和:588

約数の個数: 64

約数和(自身を含む): 54410400

約数和(自身を除く): 32492680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 109, 110, 218, 220, 436, 440, 457, 545, 872, 914, 1090, 1199, 1828, 2180, 2285, 2398, 3656, 4360, 4570, 4796, 5027, 5995, 9140, 9592, 10054, 11990, 18280, 20108, 23980, 25135, 40216, 47960, 49813, 50270, 99626, 100540, 199252, 201080, 249065, 398504, 498130, 547943, 996260, 1095886, 1992520, 2191772, 2739715, 4383544, 5479430, 10958860, 21917720]

約数ペア:

[(1, 21917720), (2, 10958860), (4, 5479430), (5, 4383544), (8, 2739715), (10, 2191772), (11, 1992520), (20, 1095886), (22, 996260), (40, 547943), (44, 498130), (55, 398504), (88, 249065), (109, 201080), (110, 199252), (218, 100540), (220, 99626), (436, 50270), (440, 49813), (457, 47960), (545, 40216), (872, 25135), (914, 23980), (1090, 20108), (1199, 18280), (1828, 11990), (2180, 10054), (2285, 9592), (2398, 9140), (3656, 5995), (4360, 5027), (4570, 4796)]