20660440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1321}}^1$

素因数の和:1372

約数の個数: 64

約数和(自身を含む): 51399360

約数和(自身を除く): 30738920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1321, 1564, 1955, 2642, 3128, 3910, 5284, 6605, 7820, 10568, 13210, 15640, 22457, 26420, 30383, 44914, 52840, 60766, 89828, 112285, 121532, 151915, 179656, 224570, 243064, 303830, 449140, 516511, 607660, 898280, 1033022, 1215320, 2066044, 2582555, 4132088, 5165110, 10330220, 20660440]

約数ペア:

[(1, 20660440), (2, 10330220), (4, 5165110), (5, 4132088), (8, 2582555), (10, 2066044), (17, 1215320), (20, 1033022), (23, 898280), (34, 607660), (40, 516511), (46, 449140), (68, 303830), (85, 243064), (92, 224570), (115, 179656), (136, 151915), (170, 121532), (184, 112285), (230, 89828), (340, 60766), (391, 52840), (460, 44914), (680, 30383), (782, 26420), (920, 22457), (1321, 15640), (1564, 13210), (1955, 10568), (2642, 7820), (3128, 6605), (3910, 5284)]