18910216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{521}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 38367000

約数和(自身を除く): 19456784

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 349, 521, 698, 1042, 1396, 2084, 2792, 4168, 4537, 6773, 9074, 13546, 18148, 27092, 36296, 54184, 181829, 363658, 727316, 1454632, 2363777, 4727554, 9455108, 18910216]

約数ペア:

[(1, 18910216), (2, 9455108), (4, 4727554), (8, 2363777), (13, 1454632), (26, 727316), (52, 363658), (104, 181829), (349, 54184), (521, 36296), (698, 27092), (1042, 18148), (1396, 13546), (2084, 9074), (2792, 6773), (4168, 4537)]