20178730

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 43400448

約数和(自身を除く): 23221718

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 103, 110, 130, 137, 143, 206, 274, 286, 515, 685, 715, 1030, 1133, 1339, 1370, 1430, 1507, 1781, 2266, 2678, 3014, 3562, 5665, 6695, 7535, 8905, 11330, 13390, 14111, 14729, 15070, 17810, 19591, 28222, 29458, 39182, 70555, 73645, 97955, 141110, 147290, 155221, 183443, 195910, 310442, 366886, 776105, 917215, 1552210, 1834430, 2017873, 4035746, 10089365, 20178730]

約数ペア:

[(1, 20178730), (2, 10089365), (5, 4035746), (10, 2017873), (11, 1834430), (13, 1552210), (22, 917215), (26, 776105), (55, 366886), (65, 310442), (103, 195910), (110, 183443), (130, 155221), (137, 147290), (143, 141110), (206, 97955), (274, 73645), (286, 70555), (515, 39182), (685, 29458), (715, 28222), (1030, 19591), (1133, 17810), (1339, 15070), (1370, 14729), (1430, 14111), (1507, 13390), (1781, 11330), (2266, 8905), (2678, 7535), (3014, 6695), (3562, 5665)]