18921640

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:322

約数の個数: 64

約数和(自身を含む): 45048960

約数和(自身を除く): 26127320

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 131, 157, 184, 230, 262, 314, 460, 524, 628, 655, 785, 920, 1048, 1256, 1310, 1570, 2620, 3013, 3140, 3611, 5240, 6026, 6280, 7222, 12052, 14444, 15065, 18055, 20567, 24104, 28888, 30130, 36110, 41134, 60260, 72220, 82268, 102835, 120520, 144440, 164536, 205670, 411340, 473041, 822680, 946082, 1892164, 2365205, 3784328, 4730410, 9460820, 18921640]

約数ペア:

[(1, 18921640), (2, 9460820), (4, 4730410), (5, 3784328), (8, 2365205), (10, 1892164), (20, 946082), (23, 822680), (40, 473041), (46, 411340), (92, 205670), (115, 164536), (131, 144440), (157, 120520), (184, 102835), (230, 82268), (262, 72220), (314, 60260), (460, 41134), (524, 36110), (628, 30130), (655, 28888), (785, 24104), (920, 20567), (1048, 18055), (1256, 15065), (1310, 14444), (1570, 12052), (2620, 7222), (3013, 6280), (3140, 6026), (3611, 5240)]