21358575

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 44568576

約数和(自身を除く): 23210001

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 71, 75, 105, 175, 191, 213, 225, 315, 355, 497, 525, 573, 639, 955, 1065, 1337, 1491, 1575, 1719, 1775, 2485, 2865, 3195, 4011, 4473, 4775, 5325, 6685, 7455, 8595, 12033, 12425, 13561, 14325, 15975, 20055, 22365, 33425, 37275, 40683, 42975, 60165, 67805, 94927, 100275, 111825, 122049, 203415, 284781, 300825, 339025, 474635, 610245, 854343, 1017075, 1423905, 2373175, 3051225, 4271715, 7119525, 21358575]

約数ペア:

[(1, 21358575), (3, 7119525), (5, 4271715), (7, 3051225), (9, 2373175), (15, 1423905), (21, 1017075), (25, 854343), (35, 610245), (45, 474635), (63, 339025), (71, 300825), (75, 284781), (105, 203415), (175, 122049), (191, 111825), (213, 100275), (225, 94927), (315, 67805), (355, 60165), (497, 42975), (525, 40683), (573, 37275), (639, 33425), (955, 22365), (1065, 20055), (1337, 15975), (1491, 14325), (1575, 13561), (1719, 12425), (1775, 12033), (2485, 8595), (2865, 7455), (3195, 6685), (4011, 5325), (4473, 4775)]