17988680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:294

約数の個数: 64

約数和(自身を含む): 42508800

約数和(自身を除く): 24520120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 89, 124, 155, 163, 178, 248, 310, 326, 356, 445, 620, 652, 712, 815, 890, 1240, 1304, 1630, 1780, 2759, 3260, 3560, 5053, 5518, 6520, 10106, 11036, 13795, 14507, 20212, 22072, 25265, 27590, 29014, 40424, 50530, 55180, 58028, 72535, 101060, 110360, 116056, 145070, 202120, 290140, 449717, 580280, 899434, 1798868, 2248585, 3597736, 4497170, 8994340, 17988680]

約数ペア:

[(1, 17988680), (2, 8994340), (4, 4497170), (5, 3597736), (8, 2248585), (10, 1798868), (20, 899434), (31, 580280), (40, 449717), (62, 290140), (89, 202120), (124, 145070), (155, 116056), (163, 110360), (178, 101060), (248, 72535), (310, 58028), (326, 55180), (356, 50530), (445, 40424), (620, 29014), (652, 27590), (712, 25265), (815, 22072), (890, 20212), (1240, 14507), (1304, 13795), (1630, 11036), (1780, 10106), (2759, 6520), (3260, 5518), (3560, 5053)]