128678680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1889}}^1$

素因数の和:2044

約数の個数: 64

約数和(自身を含む): 314344800

約数和(自身を除く): 185666120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 131, 260, 262, 520, 524, 655, 1048, 1310, 1703, 1889, 2620, 3406, 3778, 5240, 6812, 7556, 8515, 9445, 13624, 15112, 17030, 18890, 24557, 34060, 37780, 49114, 68120, 75560, 98228, 122785, 196456, 245570, 247459, 491140, 494918, 982280, 989836, 1237295, 1979672, 2474590, 3216967, 4949180, 6433934, 9898360, 12867868, 16084835, 25735736, 32169670, 64339340, 128678680]

約数ペア:

[(1, 128678680), (2, 64339340), (4, 32169670), (5, 25735736), (8, 16084835), (10, 12867868), (13, 9898360), (20, 6433934), (26, 4949180), (40, 3216967), (52, 2474590), (65, 1979672), (104, 1237295), (130, 989836), (131, 982280), (260, 494918), (262, 491140), (520, 247459), (524, 245570), (655, 196456), (1048, 122785), (1310, 98228), (1703, 75560), (1889, 68120), (2620, 49114), (3406, 37780), (3778, 34060), (5240, 24557), (6812, 18890), (7556, 17030), (8515, 15112), (9445, 13624)]