21523740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7321}}^1$

素因数の和:7347

約数の個数: 72

約数和(自身を含む): 70115472

約数和(自身を除く): 48591732

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7321, 14642, 21963, 29284, 36605, 43926, 51247, 73210, 87852, 102494, 109815, 146420, 153741, 204988, 219630, 256235, 307482, 358729, 439260, 512470, 614964, 717458, 768705, 1024940, 1076187, 1434916, 1537410, 1793645, 2152374, 3074820, 3587290, 4304748, 5380935, 7174580, 10761870, 21523740]

約数ペア:

[(1, 21523740), (2, 10761870), (3, 7174580), (4, 5380935), (5, 4304748), (6, 3587290), (7, 3074820), (10, 2152374), (12, 1793645), (14, 1537410), (15, 1434916), (20, 1076187), (21, 1024940), (28, 768705), (30, 717458), (35, 614964), (42, 512470), (49, 439260), (60, 358729), (70, 307482), (84, 256235), (98, 219630), (105, 204988), (140, 153741), (147, 146420), (196, 109815), (210, 102494), (245, 87852), (294, 73210), (420, 51247), (490, 43926), (588, 36605), (735, 29284), (980, 21963), (1470, 14642), (2940, 7321)]