21593780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{157}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 51375912

約数和(自身を除く): 29782132

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 157, 230, 260, 299, 314, 460, 529, 598, 628, 785, 1058, 1196, 1495, 1570, 2041, 2116, 2645, 2990, 3140, 3611, 4082, 5290, 5980, 6877, 7222, 8164, 10205, 10580, 13754, 14444, 18055, 20410, 27508, 34385, 36110, 40820, 46943, 68770, 72220, 83053, 93886, 137540, 166106, 187772, 234715, 332212, 415265, 469430, 830530, 938860, 1079689, 1661060, 2159378, 4318756, 5398445, 10796890, 21593780]

約数ペア:

[(1, 21593780), (2, 10796890), (4, 5398445), (5, 4318756), (10, 2159378), (13, 1661060), (20, 1079689), (23, 938860), (26, 830530), (46, 469430), (52, 415265), (65, 332212), (92, 234715), (115, 187772), (130, 166106), (157, 137540), (230, 93886), (260, 83053), (299, 72220), (314, 68770), (460, 46943), (529, 40820), (598, 36110), (628, 34385), (785, 27508), (1058, 20410), (1196, 18055), (1495, 14444), (1570, 13754), (2041, 10580), (2116, 10205), (2645, 8164), (2990, 7222), (3140, 6877), (3611, 5980), (4082, 5290)]