21445645

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{367}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 29675520

約数和(自身を除く): 8229875

約数列:

[1, 5, 13, 29, 31, 65, 145, 155, 367, 377, 403, 899, 1835, 1885, 2015, 4495, 4771, 10643, 11377, 11687, 23855, 53215, 56885, 58435, 138359, 147901, 329933, 691795, 739505, 1649665, 4289129, 21445645]

約数ペア:

[(1, 21445645), (5, 4289129), (13, 1649665), (29, 739505), (31, 691795), (65, 329933), (145, 147901), (155, 138359), (367, 58435), (377, 56885), (403, 53215), (899, 23855), (1835, 11687), (1885, 11377), (2015, 10643), (4495, 4771)]