21004893

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:215

約数の個数: 64

約数和(自身を含む): 39137280

約数和(自身を除く): 18132387

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 83, 91, 103, 117, 189, 249, 273, 309, 351, 581, 721, 747, 819, 927, 1079, 1339, 1743, 2163, 2241, 2457, 2781, 3237, 4017, 5229, 6489, 7553, 8549, 9373, 9711, 12051, 15687, 19467, 22659, 25647, 28119, 29133, 36153, 59843, 67977, 76941, 84357, 111137, 179529, 203931, 230823, 253071, 333411, 538587, 777959, 1000233, 1615761, 2333877, 3000699, 7001631, 21004893]

約数ペア:

[(1, 21004893), (3, 7001631), (7, 3000699), (9, 2333877), (13, 1615761), (21, 1000233), (27, 777959), (39, 538587), (63, 333411), (83, 253071), (91, 230823), (103, 203931), (117, 179529), (189, 111137), (249, 84357), (273, 76941), (309, 67977), (351, 59843), (581, 36153), (721, 29133), (747, 28119), (819, 25647), (927, 22659), (1079, 19467), (1339, 15687), (1743, 12051), (2163, 9711), (2241, 9373), (2457, 8549), (2781, 7553), (3237, 6489), (4017, 5229)]