20256775

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{619}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 33212160

約数和(自身を除く): 12955385

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 85, 119, 175, 187, 275, 385, 425, 595, 619, 935, 1309, 1925, 2975, 3095, 4333, 4675, 6545, 6809, 10523, 15475, 21665, 32725, 34045, 47663, 52615, 73661, 108325, 115753, 170225, 238315, 263075, 368305, 578765, 810271, 1191575, 1841525, 2893825, 4051355, 20256775]

約数ペア:

[(1, 20256775), (5, 4051355), (7, 2893825), (11, 1841525), (17, 1191575), (25, 810271), (35, 578765), (55, 368305), (77, 263075), (85, 238315), (119, 170225), (175, 115753), (187, 108325), (275, 73661), (385, 52615), (425, 47663), (595, 34045), (619, 32725), (935, 21665), (1309, 15475), (1925, 10523), (2975, 6809), (3095, 6545), (4333, 4675)]