19950775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 29623104

約数和(自身を除く): 9672329

約数列:

[1, 5, 13, 17, 23, 25, 65, 85, 115, 157, 221, 299, 325, 391, 425, 575, 785, 1105, 1495, 1955, 2041, 2669, 3611, 3925, 5083, 5525, 7475, 9775, 10205, 13345, 18055, 25415, 34697, 46943, 51025, 61387, 66725, 90275, 127075, 173485, 234715, 306935, 798031, 867425, 1173575, 1534675, 3990155, 19950775]

約数ペア:

[(1, 19950775), (5, 3990155), (13, 1534675), (17, 1173575), (23, 867425), (25, 798031), (65, 306935), (85, 234715), (115, 173485), (157, 127075), (221, 90275), (299, 66725), (325, 61387), (391, 51025), (425, 46943), (575, 34697), (785, 25415), (1105, 18055), (1495, 13345), (1955, 10205), (2041, 9775), (2669, 7475), (3611, 5525), (3925, 5083)]