20885940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1$

素因数の和:262

約数の個数: 144

約数和(自身を含む): 69189120

約数和(自身を除く): 48303180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 31, 36, 38, 45, 57, 60, 62, 76, 90, 93, 95, 114, 124, 155, 171, 180, 186, 190, 197, 228, 279, 285, 310, 342, 372, 380, 394, 465, 558, 570, 589, 591, 620, 684, 788, 855, 930, 985, 1116, 1140, 1178, 1182, 1395, 1710, 1767, 1773, 1860, 1970, 2356, 2364, 2790, 2945, 2955, 3420, 3534, 3546, 3743, 3940, 5301, 5580, 5890, 5910, 6107, 7068, 7092, 7486, 8835, 8865, 10602, 11229, 11780, 11820, 12214, 14972, 17670, 17730, 18321, 18715, 21204, 22458, 24428, 26505, 30535, 33687, 35340, 35460, 36642, 37430, 44916, 53010, 54963, 56145, 61070, 67374, 73284, 74860, 91605, 106020, 109926, 112290, 116033, 122140, 134748, 168435, 183210, 219852, 224580, 232066, 274815, 336870, 348099, 366420, 464132, 549630, 580165, 673740, 696198, 1044297, 1099260, 1160330, 1392396, 1740495, 2088594, 2320660, 3480990, 4177188, 5221485, 6961980, 10442970, 20885940]

約数ペア:

[(1, 20885940), (2, 10442970), (3, 6961980), (4, 5221485), (5, 4177188), (6, 3480990), (9, 2320660), (10, 2088594), (12, 1740495), (15, 1392396), (18, 1160330), (19, 1099260), (20, 1044297), (30, 696198), (31, 673740), (36, 580165), (38, 549630), (45, 464132), (57, 366420), (60, 348099), (62, 336870), (76, 274815), (90, 232066), (93, 224580), (95, 219852), (114, 183210), (124, 168435), (155, 134748), (171, 122140), (180, 116033), (186, 112290), (190, 109926), (197, 106020), (228, 91605), (279, 74860), (285, 73284), (310, 67374), (342, 61070), (372, 56145), (380, 54963), (394, 53010), (465, 44916), (558, 37430), (570, 36642), (589, 35460), (591, 35340), (620, 33687), (684, 30535), (788, 26505), (855, 24428), (930, 22458), (985, 21204), (1116, 18715), (1140, 18321), (1178, 17730), (1182, 17670), (1395, 14972), (1710, 12214), (1767, 11820), (1773, 11780), (1860, 11229), (1970, 10602), (2356, 8865), (2364, 8835), (2790, 7486), (2945, 7092), (2955, 7068), (3420, 6107), (3534, 5910), (3546, 5890), (3743, 5580), (3940, 5301)]