18138820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{223}}^1$

素因数の和:329

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 26906684

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 83, 98, 140, 166, 196, 223, 245, 332, 415, 446, 490, 581, 830, 892, 980, 1115, 1162, 1561, 1660, 2230, 2324, 2905, 3122, 4067, 4460, 5810, 6244, 7805, 8134, 10927, 11620, 15610, 16268, 18509, 20335, 21854, 31220, 37018, 40670, 43708, 54635, 74036, 81340, 92545, 109270, 129563, 185090, 218540, 259126, 370180, 518252, 647815, 906941, 1295630, 1813882, 2591260, 3627764, 4534705, 9069410, 18138820]

約数ペア:

[(1, 18138820), (2, 9069410), (4, 4534705), (5, 3627764), (7, 2591260), (10, 1813882), (14, 1295630), (20, 906941), (28, 647815), (35, 518252), (49, 370180), (70, 259126), (83, 218540), (98, 185090), (140, 129563), (166, 109270), (196, 92545), (223, 81340), (245, 74036), (332, 54635), (415, 43708), (446, 40670), (490, 37018), (581, 31220), (830, 21854), (892, 20335), (980, 18509), (1115, 16268), (1162, 15610), (1561, 11620), (1660, 10927), (2230, 8134), (2324, 7805), (2905, 6244), (3122, 5810), (4067, 4460)]