256559720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{1831}}^1$

素因数の和:1986

約数の個数: 64

約数和(自身を含む): 601482240

約数和(自身を除く): 344922520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 113, 124, 155, 226, 248, 310, 452, 565, 620, 904, 1130, 1240, 1831, 2260, 3503, 3662, 4520, 7006, 7324, 9155, 14012, 14648, 17515, 18310, 28024, 35030, 36620, 56761, 70060, 73240, 113522, 140120, 206903, 227044, 283805, 413806, 454088, 567610, 827612, 1034515, 1135220, 1655224, 2069030, 2270440, 4138060, 6413993, 8276120, 12827986, 25655972, 32069965, 51311944, 64139930, 128279860, 256559720]

約数ペア:

[(1, 256559720), (2, 128279860), (4, 64139930), (5, 51311944), (8, 32069965), (10, 25655972), (20, 12827986), (31, 8276120), (40, 6413993), (62, 4138060), (113, 2270440), (124, 2069030), (155, 1655224), (226, 1135220), (248, 1034515), (310, 827612), (452, 567610), (565, 454088), (620, 413806), (904, 283805), (1130, 227044), (1240, 206903), (1831, 140120), (2260, 113522), (3503, 73240), (3662, 70060), (4520, 56761), (7006, 36620), (7324, 35030), (9155, 28024), (14012, 18310), (14648, 17515)]