21000737075

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1327}}^1\times {\mathrm{1619}}^1$

素因数の和:2996

約数の個数: 48

約数和(自身を含む): 28811013120

約数和(自身を除く): 7810276045

約数列:

[1, 5, 17, 23, 25, 85, 115, 391, 425, 575, 1327, 1619, 1955, 6635, 8095, 9775, 22559, 27523, 30521, 33175, 37237, 40475, 112795, 137615, 152605, 186185, 518857, 563975, 633029, 688075, 763025, 930925, 2148413, 2594285, 3165145, 10742065, 12971425, 15825725, 36523021, 49413499, 53710325, 182615105, 247067495, 840029483, 913075525, 1235337475, 4200147415, 21000737075]

約数ペア:

[(1, 21000737075), (5, 4200147415), (17, 1235337475), (23, 913075525), (25, 840029483), (85, 247067495), (115, 182615105), (391, 53710325), (425, 49413499), (575, 36523021), (1327, 15825725), (1619, 12971425), (1955, 10742065), (6635, 3165145), (8095, 2594285), (9775, 2148413), (22559, 930925), (27523, 763025), (30521, 688075), (33175, 633029), (37237, 563975), (40475, 518857), (112795, 186185), (137615, 152605)]