81738440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291923}}^1$

素因数の和:291941

約数の個数: 32

約数和(自身を含む): 210185280

約数和(自身を除く): 128446840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291923, 583846, 1167692, 1459615, 2043461, 2335384, 2919230, 4086922, 5838460, 8173844, 10217305, 11676920, 16347688, 20434610, 40869220, 81738440]

約数ペア:

[(1, 81738440), (2, 40869220), (4, 20434610), (5, 16347688), (7, 11676920), (8, 10217305), (10, 8173844), (14, 5838460), (20, 4086922), (28, 2919230), (35, 2335384), (40, 2043461), (56, 1459615), (70, 1167692), (140, 583846), (280, 291923)]