20918800

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:297

約数の個数: 120

約数和(自身を含む): 59535872

約数和(自身を除く): 38617072

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 31, 35, 40, 50, 56, 62, 70, 80, 100, 112, 124, 140, 155, 175, 200, 217, 241, 248, 280, 310, 350, 400, 434, 482, 496, 560, 620, 700, 775, 868, 964, 1085, 1205, 1240, 1400, 1550, 1687, 1736, 1928, 2170, 2410, 2480, 2800, 3100, 3374, 3472, 3856, 4340, 4820, 5425, 6025, 6200, 6748, 7471, 8435, 8680, 9640, 10850, 12050, 12400, 13496, 14942, 16870, 17360, 19280, 21700, 24100, 26992, 29884, 33740, 37355, 42175, 43400, 48200, 52297, 59768, 67480, 74710, 84350, 86800, 96400, 104594, 119536, 134960, 149420, 168700, 186775, 209188, 261485, 298840, 337400, 373550, 418376, 522970, 597680, 674800, 747100, 836752, 1045940, 1307425, 1494200, 2091880, 2614850, 2988400, 4183760, 5229700, 10459400, 20918800]

約数ペア:

[(1, 20918800), (2, 10459400), (4, 5229700), (5, 4183760), (7, 2988400), (8, 2614850), (10, 2091880), (14, 1494200), (16, 1307425), (20, 1045940), (25, 836752), (28, 747100), (31, 674800), (35, 597680), (40, 522970), (50, 418376), (56, 373550), (62, 337400), (70, 298840), (80, 261485), (100, 209188), (112, 186775), (124, 168700), (140, 149420), (155, 134960), (175, 119536), (200, 104594), (217, 96400), (241, 86800), (248, 84350), (280, 74710), (310, 67480), (350, 59768), (400, 52297), (434, 48200), (482, 43400), (496, 42175), (560, 37355), (620, 33740), (700, 29884), (775, 26992), (868, 24100), (964, 21700), (1085, 19280), (1205, 17360), (1240, 16870), (1400, 14942), (1550, 13496), (1687, 12400), (1736, 12050), (1928, 10850), (2170, 9640), (2410, 8680), (2480, 8435), (2800, 7471), (3100, 6748), (3374, 6200), (3472, 6025), (3856, 5425), (4340, 4820)]