21975560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1901}}^1$

素因数の和:1946

約数の個数: 48

約数和(自身を含む): 52552260

約数和(自身を除く): 30576700

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1901, 2312, 2890, 3802, 5780, 7604, 9505, 11560, 15208, 19010, 32317, 38020, 64634, 76040, 129268, 161585, 258536, 323170, 549389, 646340, 1098778, 1292680, 2197556, 2746945, 4395112, 5493890, 10987780, 21975560]

約数ペア:

[(1, 21975560), (2, 10987780), (4, 5493890), (5, 4395112), (8, 2746945), (10, 2197556), (17, 1292680), (20, 1098778), (34, 646340), (40, 549389), (68, 323170), (85, 258536), (136, 161585), (170, 129268), (289, 76040), (340, 64634), (578, 38020), (680, 32317), (1156, 19010), (1445, 15208), (1901, 11560), (2312, 9505), (2890, 7604), (3802, 5780)]