21210990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:341

約数の個数: 64

約数和(自身を含む): 53089344

約数和(自身を除く): 31878354

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 37, 74, 97, 111, 185, 194, 197, 222, 291, 370, 394, 485, 555, 582, 591, 970, 985, 1110, 1182, 1455, 1970, 2910, 2955, 3589, 5910, 7178, 7289, 10767, 14578, 17945, 19109, 21534, 21867, 35890, 36445, 38218, 43734, 53835, 57327, 72890, 95545, 107670, 109335, 114654, 191090, 218670, 286635, 573270, 707033, 1414066, 2121099, 3535165, 4242198, 7070330, 10605495, 21210990]

約数ペア:

[(1, 21210990), (2, 10605495), (3, 7070330), (5, 4242198), (6, 3535165), (10, 2121099), (15, 1414066), (30, 707033), (37, 573270), (74, 286635), (97, 218670), (111, 191090), (185, 114654), (194, 109335), (197, 107670), (222, 95545), (291, 72890), (370, 57327), (394, 53835), (485, 43734), (555, 38218), (582, 36445), (591, 35890), (970, 21867), (985, 21534), (1110, 19109), (1182, 17945), (1455, 14578), (1970, 10767), (2910, 7289), (2955, 7178), (3589, 5910)]