18781360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{18059}}^1$

素因数の和:18085

約数の個数: 40

約数和(自身を含む): 47028240

約数和(自身を除く): 28246880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 18059, 36118, 72236, 90295, 144472, 180590, 234767, 288944, 361180, 469534, 722360, 939068, 1173835, 1444720, 1878136, 2347670, 3756272, 4695340, 9390680, 18781360]

約数ペア:

[(1, 18781360), (2, 9390680), (4, 4695340), (5, 3756272), (8, 2347670), (10, 1878136), (13, 1444720), (16, 1173835), (20, 939068), (26, 722360), (40, 469534), (52, 361180), (65, 288944), (80, 234767), (104, 180590), (130, 144472), (208, 90295), (260, 72236), (520, 36118), (1040, 18059)]