20863185

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 40808448

約数和(自身を除く): 19945263

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 53, 69, 105, 115, 159, 161, 163, 265, 345, 371, 483, 489, 795, 805, 815, 1113, 1141, 1219, 1855, 2415, 2445, 3423, 3657, 3749, 5565, 5705, 6095, 8533, 8639, 11247, 17115, 18285, 18745, 25599, 25917, 26243, 42665, 43195, 56235, 60473, 78729, 127995, 129585, 131215, 181419, 198697, 302365, 393645, 596091, 907095, 993485, 1390879, 2980455, 4172637, 6954395, 20863185]

約数ペア:

[(1, 20863185), (3, 6954395), (5, 4172637), (7, 2980455), (15, 1390879), (21, 993485), (23, 907095), (35, 596091), (53, 393645), (69, 302365), (105, 198697), (115, 181419), (159, 131215), (161, 129585), (163, 127995), (265, 78729), (345, 60473), (371, 56235), (483, 43195), (489, 42665), (795, 26243), (805, 25917), (815, 25599), (1113, 18745), (1141, 18285), (1219, 17115), (1855, 11247), (2415, 8639), (2445, 8533), (3423, 6095), (3657, 5705), (3749, 5565)]