21275940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{283}}^1$

素因数の和:481

約数の個数: 96

約数和(自身を含む): 68705280

約数和(自身を除く): 47429340

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 179, 210, 283, 358, 420, 537, 566, 716, 849, 895, 1074, 1132, 1253, 1415, 1698, 1790, 1981, 2148, 2506, 2685, 2830, 3396, 3580, 3759, 3962, 4245, 5012, 5370, 5660, 5943, 6265, 7518, 7924, 8490, 9905, 10740, 11886, 12530, 15036, 16980, 18795, 19810, 23772, 25060, 29715, 37590, 39620, 50657, 59430, 75180, 101314, 118860, 151971, 202628, 253285, 303942, 354599, 506570, 607884, 709198, 759855, 1013140, 1063797, 1418396, 1519710, 1772995, 2127594, 3039420, 3545990, 4255188, 5318985, 7091980, 10637970, 21275940]

約数ペア:

[(1, 21275940), (2, 10637970), (3, 7091980), (4, 5318985), (5, 4255188), (6, 3545990), (7, 3039420), (10, 2127594), (12, 1772995), (14, 1519710), (15, 1418396), (20, 1063797), (21, 1013140), (28, 759855), (30, 709198), (35, 607884), (42, 506570), (60, 354599), (70, 303942), (84, 253285), (105, 202628), (140, 151971), (179, 118860), (210, 101314), (283, 75180), (358, 59430), (420, 50657), (537, 39620), (566, 37590), (716, 29715), (849, 25060), (895, 23772), (1074, 19810), (1132, 18795), (1253, 16980), (1415, 15036), (1698, 12530), (1790, 11886), (1981, 10740), (2148, 9905), (2506, 8490), (2685, 7924), (2830, 7518), (3396, 6265), (3580, 5943), (3759, 5660), (3962, 5370), (4245, 5012)]