20355345

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 37469952

約数和(自身を除く): 17114607

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 71, 115, 207, 213, 277, 345, 355, 639, 831, 1035, 1065, 1385, 1633, 2493, 3195, 4155, 4899, 6371, 8165, 12465, 14697, 19113, 19667, 24495, 31855, 57339, 59001, 73485, 95565, 98335, 177003, 286695, 295005, 452341, 885015, 1357023, 2261705, 4071069, 6785115, 20355345]

約数ペア:

[(1, 20355345), (3, 6785115), (5, 4071069), (9, 2261705), (15, 1357023), (23, 885015), (45, 452341), (69, 295005), (71, 286695), (115, 177003), (207, 98335), (213, 95565), (277, 73485), (345, 59001), (355, 57339), (639, 31855), (831, 24495), (1035, 19667), (1065, 19113), (1385, 14697), (1633, 12465), (2493, 8165), (3195, 6371), (4155, 4899)]