64813940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{191}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 147474432

約数和(自身を除く): 82660492

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 47, 76, 94, 95, 188, 190, 191, 235, 361, 380, 382, 470, 722, 764, 893, 940, 955, 1444, 1786, 1805, 1910, 3572, 3610, 3629, 3820, 4465, 7220, 7258, 8930, 8977, 14516, 16967, 17860, 17954, 18145, 33934, 35908, 36290, 44885, 67868, 68951, 72580, 84835, 89770, 137902, 169670, 170563, 179540, 275804, 339340, 341126, 344755, 682252, 689510, 852815, 1379020, 1705630, 3240697, 3411260, 6481394, 12962788, 16203485, 32406970, 64813940]

約数ペア:

[(1, 64813940), (2, 32406970), (4, 16203485), (5, 12962788), (10, 6481394), (19, 3411260), (20, 3240697), (38, 1705630), (47, 1379020), (76, 852815), (94, 689510), (95, 682252), (188, 344755), (190, 341126), (191, 339340), (235, 275804), (361, 179540), (380, 170563), (382, 169670), (470, 137902), (722, 89770), (764, 84835), (893, 72580), (940, 68951), (955, 67868), (1444, 44885), (1786, 36290), (1805, 35908), (1910, 33934), (3572, 18145), (3610, 17954), (3629, 17860), (3820, 16967), (4465, 14516), (7220, 8977), (7258, 8930)]