1285185980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1\times {\mathrm{389}}^1$

素因数の和:639

約数の個数: 96

約数和(自身を含む): 2966483520

約数和(自身を除く): 1681297540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 131, 194, 260, 262, 388, 389, 485, 524, 655, 778, 970, 1261, 1310, 1556, 1703, 1940, 1945, 2522, 2620, 3406, 3890, 5044, 5057, 6305, 6812, 7780, 8515, 10114, 12610, 12707, 17030, 20228, 25220, 25285, 25414, 34060, 37733, 50570, 50828, 50959, 63535, 75466, 101140, 101918, 127070, 150932, 165191, 188665, 203836, 254140, 254795, 330382, 377330, 490529, 509590, 660764, 662467, 754660, 825955, 981058, 1019180, 1324934, 1651910, 1962116, 2452645, 2649868, 3303820, 3312335, 4905290, 4943023, 6624670, 9810580, 9886046, 13249340, 19772092, 24715115, 49430230, 64259299, 98860460, 128518598, 257037196, 321296495, 642592990, 1285185980]

約数ペア:

[(1, 1285185980), (2, 642592990), (4, 321296495), (5, 257037196), (10, 128518598), (13, 98860460), (20, 64259299), (26, 49430230), (52, 24715115), (65, 19772092), (97, 13249340), (130, 9886046), (131, 9810580), (194, 6624670), (260, 4943023), (262, 4905290), (388, 3312335), (389, 3303820), (485, 2649868), (524, 2452645), (655, 1962116), (778, 1651910), (970, 1324934), (1261, 1019180), (1310, 981058), (1556, 825955), (1703, 754660), (1940, 662467), (1945, 660764), (2522, 509590), (2620, 490529), (3406, 377330), (3890, 330382), (5044, 254795), (5057, 254140), (6305, 203836), (6812, 188665), (7780, 165191), (8515, 150932), (10114, 127070), (12610, 101918), (12707, 101140), (17030, 75466), (20228, 63535), (25220, 50959), (25285, 50828), (25414, 50570), (34060, 37733)]