21128720

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11483}}^1$

素因数の和:11519

約数の個数: 40

約数和(自身を含む): 51264576

約数和(自身を除く): 30135856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11483, 22966, 45932, 57415, 91864, 114830, 183728, 229660, 264109, 459320, 528218, 918640, 1056436, 1320545, 2112872, 2641090, 4225744, 5282180, 10564360, 21128720]

約数ペア:

[(1, 21128720), (2, 10564360), (4, 5282180), (5, 4225744), (8, 2641090), (10, 2112872), (16, 1320545), (20, 1056436), (23, 918640), (40, 528218), (46, 459320), (80, 264109), (92, 229660), (115, 183728), (184, 114830), (230, 91864), (368, 57415), (460, 45932), (920, 22966), (1840, 11483)]