21664256

素因数分解:

$2^9\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:185

約数の個数: 80

約数和(自身を含む): 48612960

約数和(自身を除く): 26948704

約数列:

[1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 64, 68, 76, 128, 131, 136, 152, 256, 262, 272, 304, 323, 512, 524, 544, 608, 646, 1048, 1088, 1216, 1292, 2096, 2176, 2227, 2432, 2489, 2584, 4192, 4352, 4454, 4864, 4978, 5168, 8384, 8704, 8908, 9728, 9956, 10336, 16768, 17816, 19912, 20672, 33536, 35632, 39824, 41344, 42313, 67072, 71264, 79648, 82688, 84626, 142528, 159296, 165376, 169252, 285056, 318592, 338504, 570112, 637184, 677008, 1140224, 1274368, 1354016, 2708032, 5416064, 10832128, 21664256]

約数ペア:

[(1, 21664256), (2, 10832128), (4, 5416064), (8, 2708032), (16, 1354016), (17, 1274368), (19, 1140224), (32, 677008), (34, 637184), (38, 570112), (64, 338504), (68, 318592), (76, 285056), (128, 169252), (131, 165376), (136, 159296), (152, 142528), (256, 84626), (262, 82688), (272, 79648), (304, 71264), (323, 67072), (512, 42313), (524, 41344), (544, 39824), (608, 35632), (646, 33536), (1048, 20672), (1088, 19912), (1216, 17816), (1292, 16768), (2096, 10336), (2176, 9956), (2227, 9728), (2432, 8908), (2489, 8704), (2584, 8384), (4192, 5168), (4352, 4978), (4454, 4864)]