21331275

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1052

約数の個数: 48

約数和(自身を含む): 41330688

約数和(自身を除く): 19999413

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 41, 75, 105, 123, 175, 205, 287, 525, 615, 861, 991, 1025, 1435, 2973, 3075, 4305, 4955, 6937, 7175, 14865, 20811, 21525, 24775, 34685, 40631, 74325, 104055, 121893, 173425, 203155, 284417, 520275, 609465, 853251, 1015775, 1422085, 3047325, 4266255, 7110425, 21331275]

約数ペア:

[(1, 21331275), (3, 7110425), (5, 4266255), (7, 3047325), (15, 1422085), (21, 1015775), (25, 853251), (35, 609465), (41, 520275), (75, 284417), (105, 203155), (123, 173425), (175, 121893), (205, 104055), (287, 74325), (525, 40631), (615, 34685), (861, 24775), (991, 21525), (1025, 20811), (1435, 14865), (2973, 7175), (3075, 6937), (4305, 4955)]