21960225

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1$

素因数の和:287

約数の個数: 72

約数和(自身を含む): 45806592

約数和(自身を除く): 23846367

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 73, 75, 105, 175, 191, 219, 225, 315, 365, 511, 525, 573, 657, 955, 1095, 1337, 1533, 1575, 1719, 1825, 2555, 2865, 3285, 4011, 4599, 4775, 5475, 6685, 7665, 8595, 12033, 12775, 13943, 14325, 16425, 20055, 22995, 33425, 38325, 41829, 42975, 60165, 69715, 97601, 100275, 114975, 125487, 209145, 292803, 300825, 348575, 488005, 627435, 878409, 1045725, 1464015, 2440025, 3137175, 4392045, 7320075, 21960225]

約数ペア:

[(1, 21960225), (3, 7320075), (5, 4392045), (7, 3137175), (9, 2440025), (15, 1464015), (21, 1045725), (25, 878409), (35, 627435), (45, 488005), (63, 348575), (73, 300825), (75, 292803), (105, 209145), (175, 125487), (191, 114975), (219, 100275), (225, 97601), (315, 69715), (365, 60165), (511, 42975), (525, 41829), (573, 38325), (657, 33425), (955, 22995), (1095, 20055), (1337, 16425), (1533, 14325), (1575, 13943), (1719, 12775), (1825, 12033), (2555, 8595), (2865, 7665), (3285, 6685), (4011, 5475), (4599, 4775)]