31261840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 77584320

約数和(自身を除く): 46322480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 131, 152, 157, 190, 262, 304, 314, 380, 524, 628, 655, 760, 785, 1048, 1256, 1310, 1520, 1570, 2096, 2489, 2512, 2620, 2983, 3140, 4978, 5240, 5966, 6280, 9956, 10480, 11932, 12445, 12560, 14915, 19912, 20567, 23864, 24890, 29830, 39824, 41134, 47728, 49780, 59660, 82268, 99560, 102835, 119320, 164536, 199120, 205670, 238640, 329072, 390773, 411340, 781546, 822680, 1563092, 1645360, 1953865, 3126184, 3907730, 6252368, 7815460, 15630920, 31261840]

約数ペア:

[(1, 31261840), (2, 15630920), (4, 7815460), (5, 6252368), (8, 3907730), (10, 3126184), (16, 1953865), (19, 1645360), (20, 1563092), (38, 822680), (40, 781546), (76, 411340), (80, 390773), (95, 329072), (131, 238640), (152, 205670), (157, 199120), (190, 164536), (262, 119320), (304, 102835), (314, 99560), (380, 82268), (524, 59660), (628, 49780), (655, 47728), (760, 41134), (785, 39824), (1048, 29830), (1256, 24890), (1310, 23864), (1520, 20567), (1570, 19912), (2096, 14915), (2489, 12560), (2512, 12445), (2620, 11932), (2983, 10480), (3140, 9956), (4978, 6280), (5240, 5966)]