21991060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{281}}^1$

素因数の和:353

約数の個数: 96

約数和(自身を含む): 58367232

約数和(自身を除く): 36376172

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 43, 52, 65, 70, 86, 91, 130, 140, 172, 182, 215, 260, 281, 301, 364, 430, 455, 559, 562, 602, 860, 910, 1118, 1124, 1204, 1405, 1505, 1820, 1967, 2236, 2795, 2810, 3010, 3653, 3913, 3934, 5590, 5620, 6020, 7306, 7826, 7868, 9835, 11180, 12083, 14612, 15652, 18265, 19565, 19670, 24166, 25571, 36530, 39130, 39340, 48332, 51142, 60415, 73060, 78260, 84581, 102284, 120830, 127855, 157079, 169162, 241660, 255710, 314158, 338324, 422905, 511420, 628316, 785395, 845810, 1099553, 1570790, 1691620, 2199106, 3141580, 4398212, 5497765, 10995530, 21991060]

約数ペア:

[(1, 21991060), (2, 10995530), (4, 5497765), (5, 4398212), (7, 3141580), (10, 2199106), (13, 1691620), (14, 1570790), (20, 1099553), (26, 845810), (28, 785395), (35, 628316), (43, 511420), (52, 422905), (65, 338324), (70, 314158), (86, 255710), (91, 241660), (130, 169162), (140, 157079), (172, 127855), (182, 120830), (215, 102284), (260, 84581), (281, 78260), (301, 73060), (364, 60415), (430, 51142), (455, 48332), (559, 39340), (562, 39130), (602, 36530), (860, 25571), (910, 24166), (1118, 19670), (1124, 19565), (1204, 18265), (1405, 15652), (1505, 14612), (1820, 12083), (1967, 11180), (2236, 9835), (2795, 7868), (2810, 7826), (3010, 7306), (3653, 6020), (3913, 5620), (3934, 5590)]