64660280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{443}}^1$

素因数の和:584

約数の個数: 64

約数和(自身を含む): 151048800

約数和(自身を除く): 86388520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 164, 178, 205, 328, 356, 410, 443, 445, 712, 820, 886, 890, 1640, 1772, 1780, 2215, 3544, 3560, 3649, 4430, 7298, 8860, 14596, 17720, 18163, 18245, 29192, 36326, 36490, 39427, 72652, 72980, 78854, 90815, 145304, 145960, 157708, 181630, 197135, 315416, 363260, 394270, 726520, 788540, 1577080, 1616507, 3233014, 6466028, 8082535, 12932056, 16165070, 32330140, 64660280]

約数ペア:

[(1, 64660280), (2, 32330140), (4, 16165070), (5, 12932056), (8, 8082535), (10, 6466028), (20, 3233014), (40, 1616507), (41, 1577080), (82, 788540), (89, 726520), (164, 394270), (178, 363260), (205, 315416), (328, 197135), (356, 181630), (410, 157708), (443, 145960), (445, 145304), (712, 90815), (820, 78854), (886, 72980), (890, 72652), (1640, 39427), (1772, 36490), (1780, 36326), (2215, 29192), (3544, 18245), (3560, 18163), (3649, 17720), (4430, 14596), (7298, 8860)]