640483870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{1543}}^1$

素因数の和:1697

約数の個数: 64

約数和(自身を含む): 1294884864

約数和(自身を除く): 654400994

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 103, 130, 155, 206, 310, 403, 515, 806, 1030, 1339, 1543, 2015, 2678, 3086, 3193, 4030, 6386, 6695, 7715, 13390, 15430, 15965, 20059, 31930, 40118, 41509, 47833, 83018, 95666, 100295, 158929, 200590, 207545, 239165, 317858, 415090, 478330, 621829, 794645, 1243658, 1589290, 2066077, 3109145, 4132154, 4926799, 6218290, 9853598, 10330385, 20660770, 24633995, 49267990, 64048387, 128096774, 320241935, 640483870]

約数ペア:

[(1, 640483870), (2, 320241935), (5, 128096774), (10, 64048387), (13, 49267990), (26, 24633995), (31, 20660770), (62, 10330385), (65, 9853598), (103, 6218290), (130, 4926799), (155, 4132154), (206, 3109145), (310, 2066077), (403, 1589290), (515, 1243658), (806, 794645), (1030, 621829), (1339, 478330), (1543, 415090), (2015, 317858), (2678, 239165), (3086, 207545), (3193, 200590), (4030, 158929), (6386, 100295), (6695, 95666), (7715, 83018), (13390, 47833), (15430, 41509), (15965, 40118), (20059, 31930)]