21736980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{613}}^1$

素因数の和:825

約数の個数: 72

約数和(自身を含む): 66378312

約数和(自身を除く): 44641332

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 197, 394, 591, 613, 788, 985, 1182, 1226, 1773, 1839, 1970, 2364, 2452, 2955, 3065, 3546, 3678, 3940, 5517, 5910, 6130, 7092, 7356, 8865, 9195, 11034, 11820, 12260, 17730, 18390, 22068, 27585, 35460, 36780, 55170, 110340, 120761, 241522, 362283, 483044, 603805, 724566, 1086849, 1207610, 1449132, 1811415, 2173698, 2415220, 3622830, 4347396, 5434245, 7245660, 10868490, 21736980]

約数ペア:

[(1, 21736980), (2, 10868490), (3, 7245660), (4, 5434245), (5, 4347396), (6, 3622830), (9, 2415220), (10, 2173698), (12, 1811415), (15, 1449132), (18, 1207610), (20, 1086849), (30, 724566), (36, 603805), (45, 483044), (60, 362283), (90, 241522), (180, 120761), (197, 110340), (394, 55170), (591, 36780), (613, 35460), (788, 27585), (985, 22068), (1182, 18390), (1226, 17730), (1773, 12260), (1839, 11820), (1970, 11034), (2364, 9195), (2452, 8865), (2955, 7356), (3065, 7092), (3546, 6130), (3678, 5910), (3940, 5517)]