20843728

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:439

約数の個数: 40

約数和(自身を含む): 41941512

約数和(自身を除く): 21097784

約数列:

[1, 2, 4, 8, 16, 37, 74, 137, 148, 257, 274, 296, 514, 548, 592, 1028, 1096, 2056, 2192, 4112, 5069, 9509, 10138, 19018, 20276, 35209, 38036, 40552, 70418, 76072, 81104, 140836, 152144, 281672, 563344, 1302733, 2605466, 5210932, 10421864, 20843728]

約数ペア:

[(1, 20843728), (2, 10421864), (4, 5210932), (8, 2605466), (16, 1302733), (37, 563344), (74, 281672), (137, 152144), (148, 140836), (257, 81104), (274, 76072), (296, 70418), (514, 40552), (548, 38036), (592, 35209), (1028, 20276), (1096, 19018), (2056, 10138), (2192, 9509), (4112, 5069)]