19921825

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 31426560

約数和(自身を除く): 11504735

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 79, 131, 175, 275, 385, 395, 553, 655, 869, 917, 1441, 1925, 1975, 2765, 3275, 4345, 4585, 6083, 7205, 10087, 10349, 13825, 21725, 22925, 30415, 36025, 50435, 51745, 72443, 113839, 152075, 252175, 258725, 362215, 569195, 796873, 1811075, 2845975, 3984365, 19921825]

約数ペア:

[(1, 19921825), (5, 3984365), (7, 2845975), (11, 1811075), (25, 796873), (35, 569195), (55, 362215), (77, 258725), (79, 252175), (131, 152075), (175, 113839), (275, 72443), (385, 51745), (395, 50435), (553, 36025), (655, 30415), (869, 22925), (917, 21725), (1441, 13825), (1925, 10349), (1975, 10087), (2765, 7205), (3275, 6083), (4345, 4585)]