21453620

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{787}}^1$

素因数の和:872

約数の個数: 48

約数和(自身を含む): 47658240

約数和(自身を除く): 26204620

約数列:

[1, 2, 4, 5, 10, 20, 29, 47, 58, 94, 116, 145, 188, 235, 290, 470, 580, 787, 940, 1363, 1574, 2726, 3148, 3935, 5452, 6815, 7870, 13630, 15740, 22823, 27260, 36989, 45646, 73978, 91292, 114115, 147956, 184945, 228230, 369890, 456460, 739780, 1072681, 2145362, 4290724, 5363405, 10726810, 21453620]

約数ペア:

[(1, 21453620), (2, 10726810), (4, 5363405), (5, 4290724), (10, 2145362), (20, 1072681), (29, 739780), (47, 456460), (58, 369890), (94, 228230), (116, 184945), (145, 147956), (188, 114115), (235, 91292), (290, 73978), (470, 45646), (580, 36989), (787, 27260), (940, 22823), (1363, 15740), (1574, 13630), (2726, 7870), (3148, 6815), (3935, 5452)]