31978856

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:179

約数の個数: 96

約数和(自身を含む): 77299200

約数和(自身を除く): 45320344

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 31, 52, 56, 62, 91, 104, 109, 124, 169, 182, 217, 218, 248, 338, 364, 403, 434, 436, 676, 728, 763, 806, 868, 872, 1183, 1352, 1417, 1526, 1612, 1736, 2366, 2821, 2834, 3052, 3224, 3379, 4732, 5239, 5642, 5668, 6104, 6758, 9464, 9919, 10478, 11284, 11336, 13516, 18421, 19838, 20956, 22568, 23653, 27032, 36673, 36842, 39676, 41912, 43927, 47306, 73346, 73684, 79352, 87854, 94612, 128947, 146692, 147368, 175708, 189224, 257894, 293384, 307489, 351416, 515788, 571051, 614978, 1031576, 1142102, 1229956, 2284204, 2459912, 3997357, 4568408, 7994714, 15989428, 31978856]

約数ペア:

[(1, 31978856), (2, 15989428), (4, 7994714), (7, 4568408), (8, 3997357), (13, 2459912), (14, 2284204), (26, 1229956), (28, 1142102), (31, 1031576), (52, 614978), (56, 571051), (62, 515788), (91, 351416), (104, 307489), (109, 293384), (124, 257894), (169, 189224), (182, 175708), (217, 147368), (218, 146692), (248, 128947), (338, 94612), (364, 87854), (403, 79352), (434, 73684), (436, 73346), (676, 47306), (728, 43927), (763, 41912), (806, 39676), (868, 36842), (872, 36673), (1183, 27032), (1352, 23653), (1417, 22568), (1526, 20956), (1612, 19838), (1736, 18421), (2366, 13516), (2821, 11336), (2834, 11284), (3052, 10478), (3224, 9919), (3379, 9464), (4732, 6758), (5239, 6104), (5642, 5668)]