81309540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{104243}}^1$

素因数の和:104268

約数の個数: 48

約数和(自身を含む): 245181888

約数和(自身を除く): 163872348

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 104243, 208486, 312729, 416972, 521215, 625458, 1042430, 1250916, 1355159, 1563645, 2084860, 2710318, 3127290, 4065477, 5420636, 6254580, 6775795, 8130954, 13551590, 16261908, 20327385, 27103180, 40654770, 81309540]

約数ペア:

[(1, 81309540), (2, 40654770), (3, 27103180), (4, 20327385), (5, 16261908), (6, 13551590), (10, 8130954), (12, 6775795), (13, 6254580), (15, 5420636), (20, 4065477), (26, 3127290), (30, 2710318), (39, 2084860), (52, 1563645), (60, 1355159), (65, 1250916), (78, 1042430), (130, 625458), (156, 521215), (195, 416972), (260, 312729), (390, 208486), (780, 104243)]