647920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1$

素因数の和:122

約数の個数: 80

約数和(自身を含む): 1874880

約数和(自身を除く): 1226960

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 89, 91, 104, 112, 130, 140, 178, 182, 208, 260, 280, 356, 364, 445, 455, 520, 560, 623, 712, 728, 890, 910, 1040, 1157, 1246, 1424, 1456, 1780, 1820, 2314, 2492, 3115, 3560, 3640, 4628, 4984, 5785, 6230, 7120, 7280, 8099, 9256, 9968, 11570, 12460, 16198, 18512, 23140, 24920, 32396, 40495, 46280, 49840, 64792, 80990, 92560, 129584, 161980, 323960, 647920]

約数ペア:

[(1, 647920), (2, 323960), (4, 161980), (5, 129584), (7, 92560), (8, 80990), (10, 64792), (13, 49840), (14, 46280), (16, 40495), (20, 32396), (26, 24920), (28, 23140), (35, 18512), (40, 16198), (52, 12460), (56, 11570), (65, 9968), (70, 9256), (80, 8099), (89, 7280), (91, 7120), (104, 6230), (112, 5785), (130, 4984), (140, 4628), (178, 3640), (182, 3560), (208, 3115), (260, 2492), (280, 2314), (356, 1820), (364, 1780), (445, 1456), (455, 1424), (520, 1246), (560, 1157), (623, 1040), (712, 910), (728, 890)]