21397145

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{373}}^1$

素因数の和:545

約数の個数: 32

約数和(自身を含む): 32313600

約数和(自身を除く): 10916455

約数列:

[1, 5, 7, 11, 35, 55, 77, 149, 373, 385, 745, 1043, 1639, 1865, 2611, 4103, 5215, 8195, 11473, 13055, 20515, 28721, 55577, 57365, 143605, 277885, 389039, 611347, 1945195, 3056735, 4279429, 21397145]

約数ペア:

[(1, 21397145), (5, 4279429), (7, 3056735), (11, 1945195), (35, 611347), (55, 389039), (77, 277885), (149, 143605), (373, 57365), (385, 55577), (745, 28721), (1043, 20515), (1639, 13055), (1865, 11473), (2611, 8195), (4103, 5215)]