21239790

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4951}}^1$

素因数の和:4985

約数の個数: 64

約数和(自身を含む): 59899392

約数和(自身を除く): 38659602

約数列:

[1, 2, 3, 5, 6, 10, 11, 13, 15, 22, 26, 30, 33, 39, 55, 65, 66, 78, 110, 130, 143, 165, 195, 286, 330, 390, 429, 715, 858, 1430, 2145, 4290, 4951, 9902, 14853, 24755, 29706, 49510, 54461, 64363, 74265, 108922, 128726, 148530, 163383, 193089, 272305, 321815, 326766, 386178, 544610, 643630, 707993, 816915, 965445, 1415986, 1633830, 1930890, 2123979, 3539965, 4247958, 7079930, 10619895, 21239790]

約数ペア:

[(1, 21239790), (2, 10619895), (3, 7079930), (5, 4247958), (6, 3539965), (10, 2123979), (11, 1930890), (13, 1633830), (15, 1415986), (22, 965445), (26, 816915), (30, 707993), (33, 643630), (39, 544610), (55, 386178), (65, 326766), (66, 321815), (78, 272305), (110, 193089), (130, 163383), (143, 148530), (165, 128726), (195, 108922), (286, 74265), (330, 64363), (390, 54461), (429, 49510), (715, 29706), (858, 24755), (1430, 14853), (2145, 9902), (4290, 4951)]