20387185

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 31658256

約数和(自身を除く): 11271071

約数列:

[1, 5, 7, 13, 35, 37, 49, 65, 91, 173, 185, 245, 259, 455, 481, 637, 865, 1211, 1295, 1813, 2249, 2405, 3185, 3367, 6055, 6401, 8477, 9065, 11245, 15743, 16835, 23569, 32005, 42385, 44807, 78715, 83213, 110201, 117845, 224035, 313649, 416065, 551005, 582491, 1568245, 2912455, 4077437, 20387185]

約数ペア:

[(1, 20387185), (5, 4077437), (7, 2912455), (13, 1568245), (35, 582491), (37, 551005), (49, 416065), (65, 313649), (91, 224035), (173, 117845), (185, 110201), (245, 83213), (259, 78715), (455, 44807), (481, 42385), (637, 32005), (865, 23569), (1211, 16835), (1295, 15743), (1813, 11245), (2249, 9065), (2405, 8477), (3185, 6401), (3367, 6055)]