21012018

素因数分解:

$2^1\times 3^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{1423}}^1$

素因数の和:1558

約数の個数: 32

約数和(自身を含む): 44292096

約数和(自身を除く): 23280078

約数列:

[1, 2, 3, 6, 23, 46, 69, 107, 138, 214, 321, 642, 1423, 2461, 2846, 4269, 4922, 7383, 8538, 14766, 32729, 65458, 98187, 152261, 196374, 304522, 456783, 913566, 3502003, 7004006, 10506009, 21012018]

約数ペア:

[(1, 21012018), (2, 10506009), (3, 7004006), (6, 3502003), (23, 913566), (46, 456783), (69, 304522), (107, 196374), (138, 152261), (214, 98187), (321, 65458), (642, 32729), (1423, 14766), (2461, 8538), (2846, 7383), (4269, 4922)]