28756140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{9781}}^1$

素因数の和:9807

約数の個数: 72

約数和(自身を含む): 93672432

約数和(自身を除く): 64916292

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, 9781, 19562, 29343, 39124, 48905, 58686, 68467, 97810, 117372, 136934, 146715, 195620, 205401, 273868, 293430, 342335, 410802, 479269, 586860, 684670, 821604, 958538, 1027005, 1369340, 1437807, 1917076, 2054010, 2396345, 2875614, 4108020, 4792690, 5751228, 7189035, 9585380, 14378070, 28756140]

約数ペア:

[(1, 28756140), (2, 14378070), (3, 9585380), (4, 7189035), (5, 5751228), (6, 4792690), (7, 4108020), (10, 2875614), (12, 2396345), (14, 2054010), (15, 1917076), (20, 1437807), (21, 1369340), (28, 1027005), (30, 958538), (35, 821604), (42, 684670), (49, 586860), (60, 479269), (70, 410802), (84, 342335), (98, 293430), (105, 273868), (140, 205401), (147, 195620), (196, 146715), (210, 136934), (245, 117372), (294, 97810), (420, 68467), (490, 58686), (588, 48905), (735, 39124), (980, 29343), (1470, 19562), (2940, 9781)]