21623420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^2$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 56405664

約数和(自身を除く): 34782244

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 109, 130, 140, 182, 218, 260, 364, 436, 455, 545, 763, 910, 1090, 1417, 1526, 1820, 2180, 2834, 3052, 3815, 5668, 7085, 7630, 9919, 11881, 14170, 15260, 19838, 23762, 28340, 39676, 47524, 49595, 59405, 83167, 99190, 118810, 154453, 166334, 198380, 237620, 308906, 332668, 415835, 617812, 772265, 831670, 1081171, 1544530, 1663340, 2162342, 3089060, 4324684, 5405855, 10811710, 21623420]

約数ペア:

[(1, 21623420), (2, 10811710), (4, 5405855), (5, 4324684), (7, 3089060), (10, 2162342), (13, 1663340), (14, 1544530), (20, 1081171), (26, 831670), (28, 772265), (35, 617812), (52, 415835), (65, 332668), (70, 308906), (91, 237620), (109, 198380), (130, 166334), (140, 154453), (182, 118810), (218, 99190), (260, 83167), (364, 59405), (436, 49595), (455, 47524), (545, 39676), (763, 28340), (910, 23762), (1090, 19838), (1417, 15260), (1526, 14170), (1820, 11881), (2180, 9919), (2834, 7630), (3052, 7085), (3815, 5668)]