900000018

素因数分解:

$2^1\times 3^3\times {\mathrm{19}}^1\times {\mathrm{739}}^1\times {\mathrm{1187}}^1$

素因数の和:1956

約数の個数: 64

約数和(自身を含む): 2109888000

約数和(自身を除く): 1209887982

約数列:

[1, 2, 3, 6, 9, 18, 19, 27, 38, 54, 57, 114, 171, 342, 513, 739, 1026, 1187, 1478, 2217, 2374, 3561, 4434, 6651, 7122, 10683, 13302, 14041, 19953, 21366, 22553, 28082, 32049, 39906, 42123, 45106, 64098, 67659, 84246, 126369, 135318, 202977, 252738, 379107, 405954, 608931, 758214, 877193, 1217862, 1754386, 2631579, 5263158, 7894737, 15789474, 16666667, 23684211, 33333334, 47368422, 50000001, 100000002, 150000003, 300000006, 450000009, 900000018]

約数ペア:

[(1, 900000018), (2, 450000009), (3, 300000006), (6, 150000003), (9, 100000002), (18, 50000001), (19, 47368422), (27, 33333334), (38, 23684211), (54, 16666667), (57, 15789474), (114, 7894737), (171, 5263158), (342, 2631579), (513, 1754386), (739, 1217862), (1026, 877193), (1187, 758214), (1478, 608931), (2217, 405954), (2374, 379107), (3561, 252738), (4434, 202977), (6651, 135318), (7122, 126369), (10683, 84246), (13302, 67659), (14041, 64098), (19953, 45106), (21366, 42123), (22553, 39906), (28082, 32049)]