21854840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{877}}^1$

素因数の和:984

約数の個数: 64

約数和(自身を含む): 56894400

約数和(自身を除く): 35039560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 877, 890, 1246, 1754, 1780, 2492, 3115, 3508, 3560, 4385, 4984, 6139, 6230, 7016, 8770, 12278, 12460, 17540, 24556, 24920, 30695, 35080, 49112, 61390, 78053, 122780, 156106, 245560, 312212, 390265, 546371, 624424, 780530, 1092742, 1561060, 2185484, 2731855, 3122120, 4370968, 5463710, 10927420, 21854840]

約数ペア:

[(1, 21854840), (2, 10927420), (4, 5463710), (5, 4370968), (7, 3122120), (8, 2731855), (10, 2185484), (14, 1561060), (20, 1092742), (28, 780530), (35, 624424), (40, 546371), (56, 390265), (70, 312212), (89, 245560), (140, 156106), (178, 122780), (280, 78053), (356, 61390), (445, 49112), (623, 35080), (712, 30695), (877, 24920), (890, 24556), (1246, 17540), (1754, 12460), (1780, 12278), (2492, 8770), (3115, 7016), (3508, 6230), (3560, 6139), (4385, 4984)]