21049155

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{191}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 38338560

約数和(自身を除く): 17289405

約数列:

[1, 3, 5, 9, 15, 31, 45, 79, 93, 155, 191, 237, 279, 395, 465, 573, 711, 955, 1185, 1395, 1719, 2449, 2865, 3555, 5921, 7347, 8595, 12245, 15089, 17763, 22041, 29605, 36735, 45267, 53289, 75445, 88815, 110205, 135801, 226335, 266445, 467759, 679005, 1403277, 2338795, 4209831, 7016385, 21049155]

約数ペア:

[(1, 21049155), (3, 7016385), (5, 4209831), (9, 2338795), (15, 1403277), (31, 679005), (45, 467759), (79, 266445), (93, 226335), (155, 135801), (191, 110205), (237, 88815), (279, 75445), (395, 53289), (465, 45267), (573, 36735), (711, 29605), (955, 22041), (1185, 17763), (1395, 15089), (1719, 12245), (2449, 8595), (2865, 7347), (3555, 5921)]