21591780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{509}}^1$

素因数の和:629

約数の個数: 96

約数和(自身を含む): 69914880

約数和(自身を除く): 48323100

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 101, 105, 140, 202, 210, 303, 404, 420, 505, 509, 606, 707, 1010, 1018, 1212, 1414, 1515, 1527, 2020, 2036, 2121, 2545, 2828, 3030, 3054, 3535, 3563, 4242, 5090, 6060, 6108, 7070, 7126, 7635, 8484, 10180, 10605, 10689, 14140, 14252, 15270, 17815, 21210, 21378, 30540, 35630, 42420, 42756, 51409, 53445, 71260, 102818, 106890, 154227, 205636, 213780, 257045, 308454, 359863, 514090, 616908, 719726, 771135, 1028180, 1079589, 1439452, 1542270, 1799315, 2159178, 3084540, 3598630, 4318356, 5397945, 7197260, 10795890, 21591780]

約数ペア:

[(1, 21591780), (2, 10795890), (3, 7197260), (4, 5397945), (5, 4318356), (6, 3598630), (7, 3084540), (10, 2159178), (12, 1799315), (14, 1542270), (15, 1439452), (20, 1079589), (21, 1028180), (28, 771135), (30, 719726), (35, 616908), (42, 514090), (60, 359863), (70, 308454), (84, 257045), (101, 213780), (105, 205636), (140, 154227), (202, 106890), (210, 102818), (303, 71260), (404, 53445), (420, 51409), (505, 42756), (509, 42420), (606, 35630), (707, 30540), (1010, 21378), (1018, 21210), (1212, 17815), (1414, 15270), (1515, 14252), (1527, 14140), (2020, 10689), (2036, 10605), (2121, 10180), (2545, 8484), (2828, 7635), (3030, 7126), (3054, 7070), (3535, 6108), (3563, 6060), (4242, 5090)]