838789940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{9733}}^1$

素因数の和:9912

約数の個数: 48

約数和(自身を含む): 1831549440

約数和(自身を除く): 992759500

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 139, 155, 278, 310, 556, 620, 695, 1390, 2780, 4309, 8618, 9733, 17236, 19466, 21545, 38932, 43090, 48665, 86180, 97330, 194660, 301723, 603446, 1206892, 1352887, 1508615, 2705774, 3017230, 5411548, 6034460, 6764435, 13528870, 27057740, 41939497, 83878994, 167757988, 209697485, 419394970, 838789940]

約数ペア:

[(1, 838789940), (2, 419394970), (4, 209697485), (5, 167757988), (10, 83878994), (20, 41939497), (31, 27057740), (62, 13528870), (124, 6764435), (139, 6034460), (155, 5411548), (278, 3017230), (310, 2705774), (556, 1508615), (620, 1352887), (695, 1206892), (1390, 603446), (2780, 301723), (4309, 194660), (8618, 97330), (9733, 86180), (17236, 48665), (19466, 43090), (21545, 38932)]