18881988

素因数分解:

$2^2\times 3^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^2$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 48339648

約数和(自身を除く): 29457660

約数列:

[1, 2, 3, 4, 6, 12, 23, 37, 43, 46, 69, 74, 86, 92, 111, 129, 138, 148, 172, 222, 258, 276, 444, 516, 851, 989, 1591, 1702, 1849, 1978, 2553, 2967, 3182, 3404, 3698, 3956, 4773, 5106, 5547, 5934, 6364, 7396, 9546, 10212, 11094, 11868, 19092, 22188, 36593, 42527, 68413, 73186, 85054, 109779, 127581, 136826, 146372, 170108, 205239, 219558, 255162, 273652, 410478, 439116, 510324, 820956, 1573499, 3146998, 4720497, 6293996, 9440994, 18881988]

約数ペア:

[(1, 18881988), (2, 9440994), (3, 6293996), (4, 4720497), (6, 3146998), (12, 1573499), (23, 820956), (37, 510324), (43, 439116), (46, 410478), (69, 273652), (74, 255162), (86, 219558), (92, 205239), (111, 170108), (129, 146372), (138, 136826), (148, 127581), (172, 109779), (222, 85054), (258, 73186), (276, 68413), (444, 42527), (516, 36593), (851, 22188), (989, 19092), (1591, 11868), (1702, 11094), (1849, 10212), (1978, 9546), (2553, 7396), (2967, 6364), (3182, 5934), (3404, 5547), (3698, 5106), (3956, 4773)]