21495720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{271}}^1\times {\mathrm{661}}^1$

素因数の和:946

約数の個数: 64

約数和(自身を含む): 64823040

約数和(自身を除く): 43327320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 271, 542, 661, 813, 1084, 1322, 1355, 1626, 1983, 2168, 2644, 2710, 3252, 3305, 3966, 4065, 5288, 5420, 6504, 6610, 7932, 8130, 9915, 10840, 13220, 15864, 16260, 19830, 26440, 32520, 39660, 79320, 179131, 358262, 537393, 716524, 895655, 1074786, 1433048, 1791310, 2149572, 2686965, 3582620, 4299144, 5373930, 7165240, 10747860, 21495720]

約数ペア:

[(1, 21495720), (2, 10747860), (3, 7165240), (4, 5373930), (5, 4299144), (6, 3582620), (8, 2686965), (10, 2149572), (12, 1791310), (15, 1433048), (20, 1074786), (24, 895655), (30, 716524), (40, 537393), (60, 358262), (120, 179131), (271, 79320), (542, 39660), (661, 32520), (813, 26440), (1084, 19830), (1322, 16260), (1355, 15864), (1626, 13220), (1983, 10840), (2168, 9915), (2644, 8130), (2710, 7932), (3252, 6610), (3305, 6504), (3966, 5420), (4065, 5288)]