640650960

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{28703}}^1$

素因数の和:28753

約数の個数: 120

約数和(自身を含む): 2221000704

約数和(自身を除く): 1580349744

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 120, 124, 144, 155, 180, 186, 240, 248, 279, 310, 360, 372, 465, 496, 558, 620, 720, 744, 930, 1116, 1240, 1395, 1488, 1860, 2232, 2480, 2790, 3720, 4464, 5580, 7440, 11160, 22320, 28703, 57406, 86109, 114812, 143515, 172218, 229624, 258327, 287030, 344436, 430545, 459248, 516654, 574060, 688872, 861090, 889793, 1033308, 1148120, 1291635, 1377744, 1722180, 1779586, 2066616, 2296240, 2583270, 2669379, 3444360, 3559172, 4133232, 4448965, 5166540, 5338758, 6888720, 7118344, 8008137, 8897930, 10333080, 10677516, 13346895, 14236688, 16016274, 17795860, 20666160, 21355032, 26693790, 32032548, 35591720, 40040685, 42710064, 53387580, 64065096, 71183440, 80081370, 106775160, 128130192, 160162740, 213550320, 320325480, 640650960]

約数ペア:

[(1, 640650960), (2, 320325480), (3, 213550320), (4, 160162740), (5, 128130192), (6, 106775160), (8, 80081370), (9, 71183440), (10, 64065096), (12, 53387580), (15, 42710064), (16, 40040685), (18, 35591720), (20, 32032548), (24, 26693790), (30, 21355032), (31, 20666160), (36, 17795860), (40, 16016274), (45, 14236688), (48, 13346895), (60, 10677516), (62, 10333080), (72, 8897930), (80, 8008137), (90, 7118344), (93, 6888720), (120, 5338758), (124, 5166540), (144, 4448965), (155, 4133232), (180, 3559172), (186, 3444360), (240, 2669379), (248, 2583270), (279, 2296240), (310, 2066616), (360, 1779586), (372, 1722180), (465, 1377744), (496, 1291635), (558, 1148120), (620, 1033308), (720, 889793), (744, 861090), (930, 688872), (1116, 574060), (1240, 516654), (1395, 459248), (1488, 430545), (1860, 344436), (2232, 287030), (2480, 258327), (2790, 229624), (3720, 172218), (4464, 143515), (5580, 114812), (7440, 86109), (11160, 57406), (22320, 28703)]