20556508

素因数分解:

$2^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 42517440

約数和(自身を除く): 21960932

約数列:

[1, 2, 4, 7, 14, 28, 73, 89, 113, 146, 178, 226, 292, 356, 452, 511, 623, 791, 1022, 1246, 1582, 2044, 2492, 3164, 6497, 8249, 10057, 12994, 16498, 20114, 25988, 32996, 40228, 45479, 57743, 70399, 90958, 115486, 140798, 181916, 230972, 281596, 734161, 1468322, 2936644, 5139127, 10278254, 20556508]

約数ペア:

[(1, 20556508), (2, 10278254), (4, 5139127), (7, 2936644), (14, 1468322), (28, 734161), (73, 281596), (89, 230972), (113, 181916), (146, 140798), (178, 115486), (226, 90958), (292, 70399), (356, 57743), (452, 45479), (511, 40228), (623, 32996), (791, 25988), (1022, 20114), (1246, 16498), (1582, 12994), (2044, 10057), (2492, 8249), (3164, 6497)]