21231280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1223}}^1$

素因数の和:1274

約数の個数: 80

約数和(自身を含む): 58281984

約数和(自身を除く): 37050704

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1223, 1240, 1736, 2170, 2446, 2480, 3472, 4340, 4892, 6115, 8561, 8680, 9784, 12230, 17122, 17360, 19568, 24460, 34244, 37913, 42805, 48920, 68488, 75826, 85610, 97840, 136976, 151652, 171220, 189565, 265391, 303304, 342440, 379130, 530782, 606608, 684880, 758260, 1061564, 1326955, 1516520, 2123128, 2653910, 3033040, 4246256, 5307820, 10615640, 21231280]

約数ペア:

[(1, 21231280), (2, 10615640), (4, 5307820), (5, 4246256), (7, 3033040), (8, 2653910), (10, 2123128), (14, 1516520), (16, 1326955), (20, 1061564), (28, 758260), (31, 684880), (35, 606608), (40, 530782), (56, 379130), (62, 342440), (70, 303304), (80, 265391), (112, 189565), (124, 171220), (140, 151652), (155, 136976), (217, 97840), (248, 85610), (280, 75826), (310, 68488), (434, 48920), (496, 42805), (560, 37913), (620, 34244), (868, 24460), (1085, 19568), (1223, 17360), (1240, 17122), (1736, 12230), (2170, 9784), (2446, 8680), (2480, 8561), (3472, 6115), (4340, 4892)]