21783728

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{547}}^1$

素因数の和:705

約数の個数: 40

約数和(自身を含む): 44848320

約数和(自身を除く): 23064592

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 131, 152, 262, 304, 524, 547, 1048, 1094, 2096, 2188, 2489, 4376, 4978, 8752, 9956, 10393, 19912, 20786, 39824, 41572, 71657, 83144, 143314, 166288, 286628, 573256, 1146512, 1361483, 2722966, 5445932, 10891864, 21783728]

約数ペア:

[(1, 21783728), (2, 10891864), (4, 5445932), (8, 2722966), (16, 1361483), (19, 1146512), (38, 573256), (76, 286628), (131, 166288), (152, 143314), (262, 83144), (304, 71657), (524, 41572), (547, 39824), (1048, 20786), (1094, 19912), (2096, 10393), (2188, 9956), (2489, 8752), (4376, 4978)]