21298095

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{743}}^1$

素因数の和:781

約数の個数: 72

約数和(自身を含む): 46309536

約数和(自身を除く): 25011441

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 49, 63, 65, 91, 105, 117, 147, 195, 245, 273, 315, 441, 455, 585, 637, 735, 743, 819, 1365, 1911, 2205, 2229, 3185, 3715, 4095, 5201, 5733, 6687, 9555, 9659, 11145, 15603, 26005, 28665, 28977, 33435, 36407, 46809, 48295, 67613, 78015, 86931, 109221, 144885, 182035, 202839, 234045, 327663, 338065, 434655, 473291, 546105, 608517, 1014195, 1419873, 1638315, 2366455, 3042585, 4259619, 7099365, 21298095]

約数ペア:

[(1, 21298095), (3, 7099365), (5, 4259619), (7, 3042585), (9, 2366455), (13, 1638315), (15, 1419873), (21, 1014195), (35, 608517), (39, 546105), (45, 473291), (49, 434655), (63, 338065), (65, 327663), (91, 234045), (105, 202839), (117, 182035), (147, 144885), (195, 109221), (245, 86931), (273, 78015), (315, 67613), (441, 48295), (455, 46809), (585, 36407), (637, 33435), (735, 28977), (743, 28665), (819, 26005), (1365, 15603), (1911, 11145), (2205, 9659), (2229, 9555), (3185, 6687), (3715, 5733), (4095, 5201)]