19640440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1699}}^1$

素因数の和:1744

約数の個数: 48

約数和(自身を含む): 46971000

約数和(自身を除く): 27330560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1699, 2312, 2890, 3398, 5780, 6796, 8495, 11560, 13592, 16990, 28883, 33980, 57766, 67960, 115532, 144415, 231064, 288830, 491011, 577660, 982022, 1155320, 1964044, 2455055, 3928088, 4910110, 9820220, 19640440]

約数ペア:

[(1, 19640440), (2, 9820220), (4, 4910110), (5, 3928088), (8, 2455055), (10, 1964044), (17, 1155320), (20, 982022), (34, 577660), (40, 491011), (68, 288830), (85, 231064), (136, 144415), (170, 115532), (289, 67960), (340, 57766), (578, 33980), (680, 28883), (1156, 16990), (1445, 13592), (1699, 11560), (2312, 8495), (2890, 6796), (3398, 5780)]