18707990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:309

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 22764010

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 70, 79, 85, 119, 158, 170, 199, 238, 395, 398, 553, 595, 790, 995, 1106, 1190, 1343, 1393, 1990, 2686, 2765, 2786, 3383, 5530, 6715, 6766, 6965, 9401, 13430, 13930, 15721, 16915, 18802, 23681, 31442, 33830, 47005, 47362, 78605, 94010, 110047, 118405, 157210, 220094, 236810, 267257, 534514, 550235, 1100470, 1336285, 1870799, 2672570, 3741598, 9353995, 18707990]

約数ペア:

[(1, 18707990), (2, 9353995), (5, 3741598), (7, 2672570), (10, 1870799), (14, 1336285), (17, 1100470), (34, 550235), (35, 534514), (70, 267257), (79, 236810), (85, 220094), (119, 157210), (158, 118405), (170, 110047), (199, 94010), (238, 78605), (395, 47362), (398, 47005), (553, 33830), (595, 31442), (790, 23681), (995, 18802), (1106, 16915), (1190, 15721), (1343, 13930), (1393, 13430), (1990, 9401), (2686, 6965), (2765, 6766), (2786, 6715), (3383, 5530)]