18727540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:281

約数の個数: 96

約数和(自身を含む): 47416320

約数和(自身を除く): 28688780

約数列:

[1, 2, 4, 5, 10, 13, 17, 19, 20, 26, 34, 38, 52, 65, 68, 76, 85, 95, 130, 170, 190, 221, 223, 247, 260, 323, 340, 380, 442, 446, 494, 646, 884, 892, 988, 1105, 1115, 1235, 1292, 1615, 2210, 2230, 2470, 2899, 3230, 3791, 4199, 4237, 4420, 4460, 4940, 5798, 6460, 7582, 8398, 8474, 11596, 14495, 15164, 16796, 16948, 18955, 20995, 21185, 28990, 37910, 41990, 42370, 49283, 55081, 57980, 72029, 75820, 83980, 84740, 98566, 110162, 144058, 197132, 220324, 246415, 275405, 288116, 360145, 492830, 550810, 720290, 936377, 985660, 1101620, 1440580, 1872754, 3745508, 4681885, 9363770, 18727540]

約数ペア:

[(1, 18727540), (2, 9363770), (4, 4681885), (5, 3745508), (10, 1872754), (13, 1440580), (17, 1101620), (19, 985660), (20, 936377), (26, 720290), (34, 550810), (38, 492830), (52, 360145), (65, 288116), (68, 275405), (76, 246415), (85, 220324), (95, 197132), (130, 144058), (170, 110162), (190, 98566), (221, 84740), (223, 83980), (247, 75820), (260, 72029), (323, 57980), (340, 55081), (380, 49283), (442, 42370), (446, 41990), (494, 37910), (646, 28990), (884, 21185), (892, 20995), (988, 18955), (1105, 16948), (1115, 16796), (1235, 15164), (1292, 14495), (1615, 11596), (2210, 8474), (2230, 8398), (2470, 7582), (2899, 6460), (3230, 5798), (3791, 4940), (4199, 4460), (4237, 4420)]