21180250

素因数分解:

$2^1\times 5^3\times 7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1$

素因数の和:70

約数の個数: 128

約数和(自身を含む): 52416000

約数和(自身を除く): 31235750

約数列:

[1, 2, 5, 7, 10, 13, 14, 19, 25, 26, 35, 38, 49, 50, 65, 70, 91, 95, 98, 125, 130, 133, 175, 182, 190, 245, 247, 250, 266, 325, 343, 350, 455, 475, 490, 494, 637, 650, 665, 686, 875, 910, 931, 950, 1225, 1235, 1274, 1330, 1625, 1715, 1729, 1750, 1862, 2275, 2375, 2450, 2470, 3185, 3250, 3325, 3430, 3458, 4459, 4550, 4655, 4750, 6125, 6175, 6370, 6517, 6650, 8575, 8645, 8918, 9310, 11375, 12103, 12250, 12350, 13034, 15925, 16625, 17150, 17290, 22295, 22750, 23275, 24206, 30875, 31850, 32585, 33250, 42875, 43225, 44590, 46550, 60515, 61750, 65170, 79625, 84721, 85750, 86450, 111475, 116375, 121030, 159250, 162925, 169442, 216125, 222950, 232750, 302575, 325850, 423605, 432250, 557375, 605150, 814625, 847210, 1114750, 1512875, 1629250, 2118025, 3025750, 4236050, 10590125, 21180250]

約数ペア:

[(1, 21180250), (2, 10590125), (5, 4236050), (7, 3025750), (10, 2118025), (13, 1629250), (14, 1512875), (19, 1114750), (25, 847210), (26, 814625), (35, 605150), (38, 557375), (49, 432250), (50, 423605), (65, 325850), (70, 302575), (91, 232750), (95, 222950), (98, 216125), (125, 169442), (130, 162925), (133, 159250), (175, 121030), (182, 116375), (190, 111475), (245, 86450), (247, 85750), (250, 84721), (266, 79625), (325, 65170), (343, 61750), (350, 60515), (455, 46550), (475, 44590), (490, 43225), (494, 42875), (637, 33250), (650, 32585), (665, 31850), (686, 30875), (875, 24206), (910, 23275), (931, 22750), (950, 22295), (1225, 17290), (1235, 17150), (1274, 16625), (1330, 15925), (1625, 13034), (1715, 12350), (1729, 12250), (1750, 12103), (1862, 11375), (2275, 9310), (2375, 8918), (2450, 8645), (2470, 8575), (3185, 6650), (3250, 6517), (3325, 6370), (3430, 6175), (3458, 6125), (4459, 4750), (4550, 4655)]