20498770

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:255

約数の個数: 48

約数和(自身を含む): 40384008

約数和(自身を除く): 19885238

約数列:

[1, 2, 5, 10, 17, 34, 41, 82, 85, 170, 173, 205, 289, 346, 410, 578, 697, 865, 1394, 1445, 1730, 2890, 2941, 3485, 5882, 6970, 7093, 11849, 14186, 14705, 23698, 29410, 35465, 49997, 59245, 70930, 99994, 118490, 120581, 241162, 249985, 499970, 602905, 1205810, 2049877, 4099754, 10249385, 20498770]

約数ペア:

[(1, 20498770), (2, 10249385), (5, 4099754), (10, 2049877), (17, 1205810), (34, 602905), (41, 499970), (82, 249985), (85, 241162), (170, 120581), (173, 118490), (205, 99994), (289, 70930), (346, 59245), (410, 49997), (578, 35465), (697, 29410), (865, 23698), (1394, 14705), (1445, 14186), (1730, 11849), (2890, 7093), (2941, 6970), (3485, 5882)]