21000391740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{1511}}^1\times {\mathrm{77213}}^1$

素因数の和:78739

約数の個数: 72

約数和(自身を含む): 63744172128

約数和(自身を除く): 42743780388

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 1511, 3022, 4533, 6044, 7555, 9066, 13599, 15110, 18132, 22665, 27198, 30220, 45330, 54396, 67995, 77213, 90660, 135990, 154426, 231639, 271980, 308852, 386065, 463278, 694917, 772130, 926556, 1158195, 1389834, 1544260, 2316390, 2779668, 3474585, 4632780, 6949170, 13898340, 116668843, 233337686, 350006529, 466675372, 583344215, 700013058, 1050019587, 1166688430, 1400026116, 1750032645, 2100039174, 2333376860, 3500065290, 4200078348, 5250097935, 7000130580, 10500195870, 21000391740]

約数ペア:

[(1, 21000391740), (2, 10500195870), (3, 7000130580), (4, 5250097935), (5, 4200078348), (6, 3500065290), (9, 2333376860), (10, 2100039174), (12, 1750032645), (15, 1400026116), (18, 1166688430), (20, 1050019587), (30, 700013058), (36, 583344215), (45, 466675372), (60, 350006529), (90, 233337686), (180, 116668843), (1511, 13898340), (3022, 6949170), (4533, 4632780), (6044, 3474585), (7555, 2779668), (9066, 2316390), (13599, 1544260), (15110, 1389834), (18132, 1158195), (22665, 926556), (27198, 772130), (30220, 694917), (45330, 463278), (54396, 386065), (67995, 308852), (77213, 271980), (90660, 231639), (135990, 154426)]