18845216

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{509}}^1$

素因数の和:621

約数の個数: 48

約数和(自身を含む): 40483800

約数和(自身を除く): 21638584

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 89, 104, 178, 208, 356, 416, 509, 712, 1018, 1157, 1424, 2036, 2314, 2848, 4072, 4628, 6617, 8144, 9256, 13234, 16288, 18512, 26468, 37024, 45301, 52936, 90602, 105872, 181204, 211744, 362408, 588913, 724816, 1177826, 1449632, 2355652, 4711304, 9422608, 18845216]

約数ペア:

[(1, 18845216), (2, 9422608), (4, 4711304), (8, 2355652), (13, 1449632), (16, 1177826), (26, 724816), (32, 588913), (52, 362408), (89, 211744), (104, 181204), (178, 105872), (208, 90602), (356, 52936), (416, 45301), (509, 37024), (712, 26468), (1018, 18512), (1157, 16288), (1424, 13234), (2036, 9256), (2314, 8144), (2848, 6617), (4072, 4628)]