31204520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{421}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 75200400

約数和(自身を除く): 43995880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 109, 136, 170, 218, 340, 421, 436, 545, 680, 842, 872, 1090, 1684, 1853, 2105, 2180, 3368, 3706, 4210, 4360, 7157, 7412, 8420, 9265, 14314, 14824, 16840, 18530, 28628, 35785, 37060, 45889, 57256, 71570, 74120, 91778, 143140, 183556, 229445, 286280, 367112, 458890, 780113, 917780, 1560226, 1835560, 3120452, 3900565, 6240904, 7801130, 15602260, 31204520]

約数ペア:

[(1, 31204520), (2, 15602260), (4, 7801130), (5, 6240904), (8, 3900565), (10, 3120452), (17, 1835560), (20, 1560226), (34, 917780), (40, 780113), (68, 458890), (85, 367112), (109, 286280), (136, 229445), (170, 183556), (218, 143140), (340, 91778), (421, 74120), (436, 71570), (545, 57256), (680, 45889), (842, 37060), (872, 35785), (1090, 28628), (1684, 18530), (1853, 16840), (2105, 14824), (2180, 14314), (3368, 9265), (3706, 8420), (4210, 7412), (4360, 7157)]