64196980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{991}}^1$

素因数の和:1120

約数の個数: 48

約数和(自身を含む): 139991040

約数和(自身を除く): 75794060

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 790, 820, 991, 1580, 1982, 3239, 3964, 4955, 6478, 9910, 12956, 16195, 19820, 32390, 40631, 64780, 78289, 81262, 156578, 162524, 203155, 313156, 391445, 406310, 782890, 812620, 1565780, 3209849, 6419698, 12839396, 16049245, 32098490, 64196980]

約数ペア:

[(1, 64196980), (2, 32098490), (4, 16049245), (5, 12839396), (10, 6419698), (20, 3209849), (41, 1565780), (79, 812620), (82, 782890), (158, 406310), (164, 391445), (205, 313156), (316, 203155), (395, 162524), (410, 156578), (790, 81262), (820, 78289), (991, 64780), (1580, 40631), (1982, 32390), (3239, 19820), (3964, 16195), (4955, 12956), (6478, 9910)]