20542140

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{349}}^1$

素因数の和:476

約数の個数: 96

約数和(自身を含む): 64680000

約数和(自身を除く): 44137860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 109, 135, 180, 218, 270, 327, 349, 436, 540, 545, 654, 698, 981, 1047, 1090, 1308, 1396, 1635, 1745, 1962, 2094, 2180, 2943, 3141, 3270, 3490, 3924, 4188, 4905, 5235, 5886, 6282, 6540, 6980, 9423, 9810, 10470, 11772, 12564, 14715, 15705, 18846, 19620, 20940, 29430, 31410, 37692, 38041, 47115, 58860, 62820, 76082, 94230, 114123, 152164, 188460, 190205, 228246, 342369, 380410, 456492, 570615, 684738, 760820, 1027107, 1141230, 1369476, 1711845, 2054214, 2282460, 3423690, 4108428, 5135535, 6847380, 10271070, 20542140]

約数ペア:

[(1, 20542140), (2, 10271070), (3, 6847380), (4, 5135535), (5, 4108428), (6, 3423690), (9, 2282460), (10, 2054214), (12, 1711845), (15, 1369476), (18, 1141230), (20, 1027107), (27, 760820), (30, 684738), (36, 570615), (45, 456492), (54, 380410), (60, 342369), (90, 228246), (108, 190205), (109, 188460), (135, 152164), (180, 114123), (218, 94230), (270, 76082), (327, 62820), (349, 58860), (436, 47115), (540, 38041), (545, 37692), (654, 31410), (698, 29430), (981, 20940), (1047, 19620), (1090, 18846), (1308, 15705), (1396, 14715), (1635, 12564), (1745, 11772), (1962, 10470), (2094, 9810), (2180, 9423), (2943, 6980), (3141, 6540), (3270, 6282), (3490, 5886), (3924, 5235), (4188, 4905)]