18854710

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{239}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 22617290

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 49, 70, 98, 115, 161, 230, 239, 245, 322, 343, 478, 490, 686, 805, 1127, 1195, 1610, 1673, 1715, 2254, 2390, 3346, 3430, 5497, 5635, 7889, 8365, 10994, 11270, 11711, 15778, 16730, 23422, 27485, 38479, 39445, 54970, 58555, 76958, 78890, 81977, 117110, 163954, 192395, 269353, 384790, 409885, 538706, 819770, 1346765, 1885471, 2693530, 3770942, 9427355, 18854710]

約数ペア:

[(1, 18854710), (2, 9427355), (5, 3770942), (7, 2693530), (10, 1885471), (14, 1346765), (23, 819770), (35, 538706), (46, 409885), (49, 384790), (70, 269353), (98, 192395), (115, 163954), (161, 117110), (230, 81977), (239, 78890), (245, 76958), (322, 58555), (343, 54970), (478, 39445), (490, 38479), (686, 27485), (805, 23422), (1127, 16730), (1195, 15778), (1610, 11711), (1673, 11270), (1715, 10994), (2254, 8365), (2390, 7889), (3346, 5635), (3430, 5497)]