18397880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:480

約数の個数: 64

約数和(自身を含む): 43994880

約数和(自身を除く): 25597000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 401, 620, 740, 802, 1147, 1240, 1480, 1604, 2005, 2294, 3208, 4010, 4588, 5735, 8020, 9176, 11470, 12431, 14837, 16040, 22940, 24862, 29674, 45880, 49724, 59348, 62155, 74185, 99448, 118696, 124310, 148370, 248620, 296740, 459947, 497240, 593480, 919894, 1839788, 2299735, 3679576, 4599470, 9198940, 18397880]

約数ペア:

[(1, 18397880), (2, 9198940), (4, 4599470), (5, 3679576), (8, 2299735), (10, 1839788), (20, 919894), (31, 593480), (37, 497240), (40, 459947), (62, 296740), (74, 248620), (124, 148370), (148, 124310), (155, 118696), (185, 99448), (248, 74185), (296, 62155), (310, 59348), (370, 49724), (401, 45880), (620, 29674), (740, 24862), (802, 22940), (1147, 16040), (1240, 14837), (1480, 12431), (1604, 11470), (2005, 9176), (2294, 8020), (3208, 5735), (4010, 4588)]