18657704

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 40778640

約数和(自身を除く): 22120936

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 61, 68, 104, 122, 136, 173, 221, 244, 346, 442, 488, 692, 793, 884, 1037, 1384, 1586, 1768, 2074, 2249, 2941, 3172, 4148, 4498, 5882, 6344, 8296, 8996, 10553, 11764, 13481, 17992, 21106, 23528, 26962, 38233, 42212, 53924, 76466, 84424, 107848, 137189, 152932, 179401, 274378, 305864, 358802, 548756, 717604, 1097512, 1435208, 2332213, 4664426, 9328852, 18657704]

約数ペア:

[(1, 18657704), (2, 9328852), (4, 4664426), (8, 2332213), (13, 1435208), (17, 1097512), (26, 717604), (34, 548756), (52, 358802), (61, 305864), (68, 274378), (104, 179401), (122, 152932), (136, 137189), (173, 107848), (221, 84424), (244, 76466), (346, 53924), (442, 42212), (488, 38233), (692, 26962), (793, 23528), (884, 21106), (1037, 17992), (1384, 13481), (1586, 11764), (1768, 10553), (2074, 8996), (2249, 8296), (2941, 6344), (3172, 5882), (4148, 4498)]