18536920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 25008680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 127, 164, 178, 205, 254, 328, 356, 410, 445, 508, 635, 712, 820, 890, 1016, 1270, 1640, 1780, 2540, 3560, 3649, 5080, 5207, 7298, 10414, 11303, 14596, 18245, 20828, 22606, 26035, 29192, 36490, 41656, 45212, 52070, 56515, 72980, 90424, 104140, 113030, 145960, 208280, 226060, 452120, 463423, 926846, 1853692, 2317115, 3707384, 4634230, 9268460, 18536920]

約数ペア:

[(1, 18536920), (2, 9268460), (4, 4634230), (5, 3707384), (8, 2317115), (10, 1853692), (20, 926846), (40, 463423), (41, 452120), (82, 226060), (89, 208280), (127, 145960), (164, 113030), (178, 104140), (205, 90424), (254, 72980), (328, 56515), (356, 52070), (410, 45212), (445, 41656), (508, 36490), (635, 29192), (712, 26035), (820, 22606), (890, 20828), (1016, 18245), (1270, 14596), (1640, 11303), (1780, 10414), (2540, 7298), (3560, 5207), (3649, 5080)]