31220410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 63995904

約数和(自身を除く): 32775494

約数列:

[1, 2, 5, 10, 13, 26, 31, 61, 62, 65, 122, 127, 130, 155, 254, 305, 310, 403, 610, 635, 793, 806, 1270, 1586, 1651, 1891, 2015, 3302, 3782, 3937, 3965, 4030, 7747, 7874, 7930, 8255, 9455, 15494, 16510, 18910, 19685, 24583, 38735, 39370, 49166, 51181, 77470, 100711, 102362, 122915, 201422, 240157, 245830, 255905, 480314, 503555, 511810, 1007110, 1200785, 2401570, 3122041, 6244082, 15610205, 31220410]

約数ペア:

[(1, 31220410), (2, 15610205), (5, 6244082), (10, 3122041), (13, 2401570), (26, 1200785), (31, 1007110), (61, 511810), (62, 503555), (65, 480314), (122, 255905), (127, 245830), (130, 240157), (155, 201422), (254, 122915), (305, 102362), (310, 100711), (403, 77470), (610, 51181), (635, 49166), (793, 39370), (806, 38735), (1270, 24583), (1586, 19685), (1651, 18910), (1891, 16510), (2015, 15494), (3302, 9455), (3782, 8255), (3937, 7930), (3965, 7874), (4030, 7747)]