20538704

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{239}}^1$

素因数の和:419

約数の個数: 40

約数和(自身を含む): 41247360

約数和(自身を除く): 20708656

約数列:

[1, 2, 4, 8, 16, 41, 82, 131, 164, 239, 262, 328, 478, 524, 656, 956, 1048, 1912, 2096, 3824, 5371, 9799, 10742, 19598, 21484, 31309, 39196, 42968, 62618, 78392, 85936, 125236, 156784, 250472, 500944, 1283669, 2567338, 5134676, 10269352, 20538704]

約数ペア:

[(1, 20538704), (2, 10269352), (4, 5134676), (8, 2567338), (16, 1283669), (41, 500944), (82, 250472), (131, 156784), (164, 125236), (239, 85936), (262, 78392), (328, 62618), (478, 42968), (524, 39196), (656, 31309), (956, 21484), (1048, 19598), (1912, 10742), (2096, 9799), (3824, 5371)]