20825025

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 39211776

約数和(自身を除く): 18386751

約数列:

[1, 3, 5, 13, 15, 25, 31, 39, 53, 65, 75, 93, 155, 159, 169, 195, 265, 325, 403, 465, 507, 689, 775, 795, 845, 975, 1209, 1325, 1643, 2015, 2067, 2325, 2535, 3445, 3975, 4225, 4929, 5239, 6045, 8215, 8957, 10075, 10335, 12675, 15717, 17225, 21359, 24645, 26195, 26871, 30225, 41075, 44785, 51675, 64077, 78585, 106795, 123225, 130975, 134355, 223925, 277667, 320385, 392925, 533975, 671775, 833001, 1388335, 1601925, 4165005, 6941675, 20825025]

約数ペア:

[(1, 20825025), (3, 6941675), (5, 4165005), (13, 1601925), (15, 1388335), (25, 833001), (31, 671775), (39, 533975), (53, 392925), (65, 320385), (75, 277667), (93, 223925), (155, 134355), (159, 130975), (169, 123225), (195, 106795), (265, 78585), (325, 64077), (403, 51675), (465, 44785), (507, 41075), (689, 30225), (775, 26871), (795, 26195), (845, 24645), (975, 21359), (1209, 17225), (1325, 15717), (1643, 12675), (2015, 10335), (2067, 10075), (2325, 8957), (2535, 8215), (3445, 6045), (3975, 5239), (4225, 4929)]