644896648

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{18839}}^1$

素因数の和:19245

約数の個数: 32

約数和(自身を含む): 1322568000

約数和(自身を除く): 677671352

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 389, 778, 1556, 3112, 4279, 8558, 17116, 18839, 34232, 37678, 75356, 150712, 207229, 414458, 828916, 1657832, 7328371, 14656742, 29313484, 58626968, 80612081, 161224162, 322448324, 644896648]

約数ペア:

[(1, 644896648), (2, 322448324), (4, 161224162), (8, 80612081), (11, 58626968), (22, 29313484), (44, 14656742), (88, 7328371), (389, 1657832), (778, 828916), (1556, 414458), (3112, 207229), (4279, 150712), (8558, 75356), (17116, 37678), (18839, 34232)]