21994140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7481}}^1$

素因数の和:7507

約数の個数: 72

約数和(自身を含む): 71647632

約数和(自身を除く): 49653492

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7481, 14962, 22443, 29924, 37405, 44886, 52367, 74810, 89772, 104734, 112215, 149620, 157101, 209468, 224430, 261835, 314202, 366569, 448860, 523670, 628404, 733138, 785505, 1047340, 1099707, 1466276, 1571010, 1832845, 2199414, 3142020, 3665690, 4398828, 5498535, 7331380, 10997070, 21994140]

約数ペア:

[(1, 21994140), (2, 10997070), (3, 7331380), (4, 5498535), (5, 4398828), (6, 3665690), (7, 3142020), (10, 2199414), (12, 1832845), (14, 1571010), (15, 1466276), (20, 1099707), (21, 1047340), (28, 785505), (30, 733138), (35, 628404), (42, 523670), (49, 448860), (60, 366569), (70, 314202), (84, 261835), (98, 224430), (105, 209468), (140, 157101), (147, 149620), (196, 112215), (210, 104734), (245, 89772), (294, 74810), (420, 52367), (490, 44886), (588, 37405), (735, 29924), (980, 22443), (1470, 14962), (2940, 7481)]