647560641

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{953}}^1$

素因数の和:1126

約数の個数: 64

約数和(自身を含む): 1128314880

約数和(自身を除く): 480754239

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 131, 133, 247, 273, 393, 399, 741, 917, 953, 1703, 1729, 2489, 2751, 2859, 5109, 5187, 6671, 7467, 11921, 12389, 17423, 18107, 20013, 32357, 35763, 37167, 52269, 54321, 86723, 97071, 124843, 126749, 226499, 235391, 260169, 374529, 380247, 679497, 706173, 873901, 1622959, 1647737, 2372017, 2621703, 4868877, 4943211, 7116051, 11360713, 16604119, 30836221, 34082139, 49812357, 92508663, 215853547, 647560641]

約数ペア:

[(1, 647560641), (3, 215853547), (7, 92508663), (13, 49812357), (19, 34082139), (21, 30836221), (39, 16604119), (57, 11360713), (91, 7116051), (131, 4943211), (133, 4868877), (247, 2621703), (273, 2372017), (393, 1647737), (399, 1622959), (741, 873901), (917, 706173), (953, 679497), (1703, 380247), (1729, 374529), (2489, 260169), (2751, 235391), (2859, 226499), (5109, 126749), (5187, 124843), (6671, 97071), (7467, 86723), (11921, 54321), (12389, 52269), (17423, 37167), (18107, 35763), (20013, 32357)]