17640

素因数分解:

$2^3\times 3^2\times 5^1\times 7^2$

素因数の和:31

約数の個数: 72

約数和(自身を含む): 66690

約数和(自身を除く): 49050

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 49, 56, 60, 63, 70, 72, 84, 90, 98, 105, 120, 126, 140, 147, 168, 180, 196, 210, 245, 252, 280, 294, 315, 360, 392, 420, 441, 490, 504, 588, 630, 735, 840, 882, 980, 1176, 1260, 1470, 1764, 1960, 2205, 2520, 2940, 3528, 4410, 5880, 8820, 17640]

約数ペア:

[(1, 17640), (2, 8820), (3, 5880), (4, 4410), (5, 3528), (6, 2940), (7, 2520), (8, 2205), (9, 1960), (10, 1764), (12, 1470), (14, 1260), (15, 1176), (18, 980), (20, 882), (21, 840), (24, 735), (28, 630), (30, 588), (35, 504), (36, 490), (40, 441), (42, 420), (45, 392), (49, 360), (56, 315), (60, 294), (63, 280), (70, 252), (72, 245), (84, 210), (90, 196), (98, 180), (105, 168), (120, 147), (126, 140)]