640685640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{762721}}^1$

素因数の和:762742

約数の個数: 64

約数和(自身を含む): 2196639360

約数和(自身を除く): 1555953720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 762721, 1525442, 2288163, 3050884, 3813605, 4576326, 5339047, 6101768, 7627210, 9152652, 10678094, 11440815, 15254420, 16017141, 18305304, 21356188, 22881630, 26695235, 30508840, 32034282, 42712376, 45763260, 53390470, 64068564, 80085705, 91526520, 106780940, 128137128, 160171410, 213561880, 320342820, 640685640]

約数ペア:

[(1, 640685640), (2, 320342820), (3, 213561880), (4, 160171410), (5, 128137128), (6, 106780940), (7, 91526520), (8, 80085705), (10, 64068564), (12, 53390470), (14, 45763260), (15, 42712376), (20, 32034282), (21, 30508840), (24, 26695235), (28, 22881630), (30, 21356188), (35, 18305304), (40, 16017141), (42, 15254420), (56, 11440815), (60, 10678094), (70, 9152652), (84, 7627210), (105, 6101768), (120, 5339047), (140, 4576326), (168, 3813605), (210, 3050884), (280, 2288163), (420, 1525442), (840, 762721)]