21000688275

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{977}}^1\times {\mathrm{5849}}^1$

素因数の和:6853

約数の個数: 72

約数和(自身を含む): 40438148400

約数和(自身を除く): 19437460125

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 75, 105, 147, 175, 245, 525, 735, 977, 1225, 2931, 3675, 4885, 5849, 6839, 14655, 17547, 20517, 24425, 29245, 34195, 40943, 47873, 73275, 87735, 102585, 122829, 143619, 146225, 170975, 204715, 239365, 286601, 438675, 512925, 614145, 718095, 859803, 1023575, 1196825, 1433005, 3070725, 3590475, 4299015, 5714473, 7165025, 17143419, 21495075, 28572365, 40001311, 85717095, 120003933, 142861825, 200006555, 280009177, 428585475, 600019665, 840027531, 1000032775, 1400045885, 3000098325, 4200137655, 7000229425, 21000688275]

約数ペア:

[(1, 21000688275), (3, 7000229425), (5, 4200137655), (7, 3000098325), (15, 1400045885), (21, 1000032775), (25, 840027531), (35, 600019665), (49, 428585475), (75, 280009177), (105, 200006555), (147, 142861825), (175, 120003933), (245, 85717095), (525, 40001311), (735, 28572365), (977, 21495075), (1225, 17143419), (2931, 7165025), (3675, 5714473), (4885, 4299015), (5849, 3590475), (6839, 3070725), (14655, 1433005), (17547, 1196825), (20517, 1023575), (24425, 859803), (29245, 718095), (34195, 614145), (40943, 512925), (47873, 438675), (73275, 286601), (87735, 239365), (102585, 204715), (122829, 170975), (143619, 146225)]