20402001640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{137}}^1\times {\mathrm{10313}}^1$

素因数の和:10499

約数の個数: 96

約数和(自身を含む): 48806054280

約数和(自身を除く): 28404052640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 137, 152, 190, 274, 361, 380, 548, 685, 722, 760, 1096, 1370, 1444, 1805, 2603, 2740, 2888, 3610, 5206, 5480, 7220, 10313, 10412, 13015, 14440, 20626, 20824, 26030, 41252, 49457, 51565, 52060, 82504, 98914, 103130, 104120, 195947, 197828, 206260, 247285, 391894, 395656, 412520, 494570, 783788, 979735, 989140, 1412881, 1567576, 1959470, 1978280, 2825762, 3722993, 3918940, 5651524, 7064405, 7445986, 7837880, 11303048, 14128810, 14891972, 18614965, 26844739, 28257620, 29783944, 37229930, 53689478, 56515240, 74459860, 107378956, 134223695, 148919720, 214757912, 268447390, 510050041, 536894780, 1020100082, 1073789560, 2040200164, 2550250205, 4080400328, 5100500410, 10201000820, 20402001640]

約数ペア:

[(1, 20402001640), (2, 10201000820), (4, 5100500410), (5, 4080400328), (8, 2550250205), (10, 2040200164), (19, 1073789560), (20, 1020100082), (38, 536894780), (40, 510050041), (76, 268447390), (95, 214757912), (137, 148919720), (152, 134223695), (190, 107378956), (274, 74459860), (361, 56515240), (380, 53689478), (548, 37229930), (685, 29783944), (722, 28257620), (760, 26844739), (1096, 18614965), (1370, 14891972), (1444, 14128810), (1805, 11303048), (2603, 7837880), (2740, 7445986), (2888, 7064405), (3610, 5651524), (5206, 3918940), (5480, 3722993), (7220, 2825762), (10313, 1978280), (10412, 1959470), (13015, 1567576), (14440, 1412881), (20626, 989140), (20824, 979735), (26030, 783788), (41252, 494570), (49457, 412520), (51565, 395656), (52060, 391894), (82504, 247285), (98914, 206260), (103130, 197828), (104120, 195947)]