20158928

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{419}}^1$

素因数の和:555

約数の個数: 40

約数和(自身を含む): 40830720

約数和(自身を除く): 20671792

約数列:

[1, 2, 4, 8, 16, 31, 62, 97, 124, 194, 248, 388, 419, 496, 776, 838, 1552, 1676, 3007, 3352, 6014, 6704, 12028, 12989, 24056, 25978, 40643, 48112, 51956, 81286, 103912, 162572, 207824, 325144, 650288, 1259933, 2519866, 5039732, 10079464, 20158928]

約数ペア:

[(1, 20158928), (2, 10079464), (4, 5039732), (8, 2519866), (16, 1259933), (31, 650288), (62, 325144), (97, 207824), (124, 162572), (194, 103912), (248, 81286), (388, 51956), (419, 48112), (496, 40643), (776, 25978), (838, 24056), (1552, 12989), (1676, 12028), (3007, 6704), (3352, 6014)]