278889325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{431}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 409473792

約数和(自身を除く): 130584467

約数列:

[1, 5, 11, 13, 25, 55, 65, 143, 181, 275, 325, 431, 715, 905, 1991, 2155, 2353, 3575, 4525, 4741, 5603, 9955, 10775, 11765, 23705, 25883, 28015, 49775, 58825, 61633, 78011, 118525, 129415, 140075, 308165, 390055, 647075, 858121, 1014143, 1540825, 1950275, 4290605, 5070715, 11155573, 21453025, 25353575, 55777865, 278889325]

約数ペア:

[(1, 278889325), (5, 55777865), (11, 25353575), (13, 21453025), (25, 11155573), (55, 5070715), (65, 4290605), (143, 1950275), (181, 1540825), (275, 1014143), (325, 858121), (431, 647075), (715, 390055), (905, 308165), (1991, 140075), (2155, 129415), (2353, 118525), (3575, 78011), (4525, 61633), (4741, 58825), (5603, 49775), (9955, 28015), (10775, 25883), (11765, 23705)]