21132214720

素因数分解:

$2^6\times 5^1\times {\mathrm{397}}^2\times {\mathrm{419}}^1$

素因数の和:1230

約数の個数: 84

約数和(自身を含む): 50568560280

約数和(自身を除く): 29436345560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 397, 419, 794, 838, 1588, 1676, 1985, 2095, 3176, 3352, 3970, 4190, 6352, 6704, 7940, 8380, 12704, 13408, 15880, 16760, 25408, 26816, 31760, 33520, 63520, 67040, 127040, 134080, 157609, 166343, 315218, 332686, 630436, 665372, 788045, 831715, 1260872, 1330744, 1576090, 1663430, 2521744, 2661488, 3152180, 3326860, 5043488, 5322976, 6304360, 6653720, 10086976, 10645952, 12608720, 13307440, 25217440, 26614880, 50434880, 53229760, 66038171, 132076342, 264152684, 330190855, 528305368, 660381710, 1056610736, 1320763420, 2113221472, 2641526840, 4226442944, 5283053680, 10566107360, 21132214720]

約数ペア:

[(1, 21132214720), (2, 10566107360), (4, 5283053680), (5, 4226442944), (8, 2641526840), (10, 2113221472), (16, 1320763420), (20, 1056610736), (32, 660381710), (40, 528305368), (64, 330190855), (80, 264152684), (160, 132076342), (320, 66038171), (397, 53229760), (419, 50434880), (794, 26614880), (838, 25217440), (1588, 13307440), (1676, 12608720), (1985, 10645952), (2095, 10086976), (3176, 6653720), (3352, 6304360), (3970, 5322976), (4190, 5043488), (6352, 3326860), (6704, 3152180), (7940, 2661488), (8380, 2521744), (12704, 1663430), (13408, 1576090), (15880, 1330744), (16760, 1260872), (25408, 831715), (26816, 788045), (31760, 665372), (33520, 630436), (63520, 332686), (67040, 315218), (127040, 166343), (134080, 157609)]