21906560

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2633}}^1$

素因数の和:2665

約数の個数: 64

約数和(自身を含む): 56420280

約数和(自身を除く): 34513720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2633, 4160, 5266, 8320, 10532, 13165, 21064, 26330, 34229, 42128, 52660, 68458, 84256, 105320, 136916, 168512, 171145, 210640, 273832, 337024, 342290, 421280, 547664, 684580, 842560, 1095328, 1369160, 1685120, 2190656, 2738320, 4381312, 5476640, 10953280, 21906560]

約数ペア:

[(1, 21906560), (2, 10953280), (4, 5476640), (5, 4381312), (8, 2738320), (10, 2190656), (13, 1685120), (16, 1369160), (20, 1095328), (26, 842560), (32, 684580), (40, 547664), (52, 421280), (64, 342290), (65, 337024), (80, 273832), (104, 210640), (128, 171145), (130, 168512), (160, 136916), (208, 105320), (260, 84256), (320, 68458), (416, 52660), (520, 42128), (640, 34229), (832, 26330), (1040, 21064), (1664, 13165), (2080, 10532), (2633, 8320), (4160, 5266)]