21237804

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1187}}^1$

素因数の和:1275

約数の個数: 72

約数和(自身を含む): 62270208

約数和(自身を除く): 41032404

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 71, 84, 126, 142, 213, 252, 284, 426, 497, 639, 852, 994, 1187, 1278, 1491, 1988, 2374, 2556, 2982, 3561, 4473, 4748, 5964, 7122, 8309, 8946, 10683, 14244, 16618, 17892, 21366, 24927, 33236, 42732, 49854, 74781, 84277, 99708, 149562, 168554, 252831, 299124, 337108, 505662, 589939, 758493, 1011324, 1179878, 1516986, 1769817, 2359756, 3033972, 3539634, 5309451, 7079268, 10618902, 21237804]

約数ペア:

[(1, 21237804), (2, 10618902), (3, 7079268), (4, 5309451), (6, 3539634), (7, 3033972), (9, 2359756), (12, 1769817), (14, 1516986), (18, 1179878), (21, 1011324), (28, 758493), (36, 589939), (42, 505662), (63, 337108), (71, 299124), (84, 252831), (126, 168554), (142, 149562), (213, 99708), (252, 84277), (284, 74781), (426, 49854), (497, 42732), (639, 33236), (852, 24927), (994, 21366), (1187, 17892), (1278, 16618), (1491, 14244), (1988, 10683), (2374, 8946), (2556, 8309), (2982, 7122), (3561, 5964), (4473, 4748)]