18479780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4421}}^1$

素因数の和:4460

約数の個数: 48

約数和(自身を含む): 44573760

約数和(自身を除く): 26093980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4421, 8842, 17684, 22105, 44210, 48631, 83999, 88420, 97262, 167998, 194524, 243155, 335996, 419995, 486310, 839990, 923989, 972620, 1679980, 1847978, 3695956, 4619945, 9239890, 18479780]

約数ペア:

[(1, 18479780), (2, 9239890), (4, 4619945), (5, 3695956), (10, 1847978), (11, 1679980), (19, 972620), (20, 923989), (22, 839990), (38, 486310), (44, 419995), (55, 335996), (76, 243155), (95, 194524), (110, 167998), (190, 97262), (209, 88420), (220, 83999), (380, 48631), (418, 44210), (836, 22105), (1045, 17684), (2090, 8842), (4180, 4421)]