28258515

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 51757056

約数和(自身を除く): 23498541

約数列:

[1, 3, 5, 9, 15, 31, 45, 47, 93, 141, 155, 235, 279, 423, 431, 465, 705, 1293, 1395, 1457, 2115, 2155, 3879, 4371, 6465, 7285, 13113, 13361, 19395, 20257, 21855, 40083, 60771, 65565, 66805, 101285, 120249, 182313, 200415, 303855, 601245, 627967, 911565, 1883901, 3139835, 5651703, 9419505, 28258515]

約数ペア:

[(1, 28258515), (3, 9419505), (5, 5651703), (9, 3139835), (15, 1883901), (31, 911565), (45, 627967), (47, 601245), (93, 303855), (141, 200415), (155, 182313), (235, 120249), (279, 101285), (423, 66805), (431, 65565), (465, 60771), (705, 40083), (1293, 21855), (1395, 20257), (1457, 19395), (2115, 13361), (2155, 13113), (3879, 7285), (4371, 6465)]