21000228112

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77206721}}^1$

素因数の和:77206746

約数の個数: 20

約数和(自身を含む): 43081350876

約数和(自身を除く): 22081122764

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77206721, 154413442, 308826884, 617653768, 1235307536, 1312514257, 2625028514, 5250057028, 10500114056, 21000228112]

約数ペア:

[(1, 21000228112), (2, 10500114056), (4, 5250057028), (8, 2625028514), (16, 1312514257), (17, 1235307536), (34, 617653768), (68, 308826884), (136, 154413442), (272, 77206721)]