20922640

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:256

約数の個数: 80

約数和(自身を含む): 51746688

約数和(自身を除く): 30824048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 83, 92, 115, 137, 166, 184, 230, 274, 332, 368, 415, 460, 548, 664, 685, 830, 920, 1096, 1328, 1370, 1660, 1840, 1909, 2192, 2740, 3151, 3320, 3818, 5480, 6302, 6640, 7636, 9545, 10960, 11371, 12604, 15272, 15755, 19090, 22742, 25208, 30544, 31510, 38180, 45484, 50416, 56855, 63020, 76360, 90968, 113710, 126040, 152720, 181936, 227420, 252080, 261533, 454840, 523066, 909680, 1046132, 1307665, 2092264, 2615330, 4184528, 5230660, 10461320, 20922640]

約数ペア:

[(1, 20922640), (2, 10461320), (4, 5230660), (5, 4184528), (8, 2615330), (10, 2092264), (16, 1307665), (20, 1046132), (23, 909680), (40, 523066), (46, 454840), (80, 261533), (83, 252080), (92, 227420), (115, 181936), (137, 152720), (166, 126040), (184, 113710), (230, 90968), (274, 76360), (332, 63020), (368, 56855), (415, 50416), (460, 45484), (548, 38180), (664, 31510), (685, 30544), (830, 25208), (920, 22742), (1096, 19090), (1328, 15755), (1370, 15272), (1660, 12604), (1840, 11371), (1909, 10960), (2192, 9545), (2740, 7636), (3151, 6640), (3320, 6302), (3818, 5480)]