19911080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:171

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 36076120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 47, 56, 68, 70, 85, 89, 94, 119, 136, 140, 170, 178, 188, 235, 238, 280, 329, 340, 356, 376, 445, 470, 476, 595, 623, 658, 680, 712, 799, 890, 940, 952, 1190, 1246, 1316, 1513, 1598, 1645, 1780, 1880, 2380, 2492, 2632, 3026, 3115, 3196, 3290, 3560, 3995, 4183, 4760, 4984, 5593, 6052, 6230, 6392, 6580, 7565, 7990, 8366, 10591, 11186, 12104, 12460, 13160, 15130, 15980, 16732, 20915, 21182, 22372, 24920, 27965, 29281, 30260, 31960, 33464, 41830, 42364, 44744, 52955, 55930, 58562, 60520, 71111, 83660, 84728, 105910, 111860, 117124, 142222, 146405, 167320, 211820, 223720, 234248, 284444, 292810, 355555, 423640, 497777, 568888, 585620, 711110, 995554, 1171240, 1422220, 1991108, 2488885, 2844440, 3982216, 4977770, 9955540, 19911080]

約数ペア:

[(1, 19911080), (2, 9955540), (4, 4977770), (5, 3982216), (7, 2844440), (8, 2488885), (10, 1991108), (14, 1422220), (17, 1171240), (20, 995554), (28, 711110), (34, 585620), (35, 568888), (40, 497777), (47, 423640), (56, 355555), (68, 292810), (70, 284444), (85, 234248), (89, 223720), (94, 211820), (119, 167320), (136, 146405), (140, 142222), (170, 117124), (178, 111860), (188, 105910), (235, 84728), (238, 83660), (280, 71111), (329, 60520), (340, 58562), (356, 55930), (376, 52955), (445, 44744), (470, 42364), (476, 41830), (595, 33464), (623, 31960), (658, 30260), (680, 29281), (712, 27965), (799, 24920), (890, 22372), (940, 21182), (952, 20915), (1190, 16732), (1246, 15980), (1316, 15130), (1513, 13160), (1598, 12460), (1645, 12104), (1780, 11186), (1880, 10591), (2380, 8366), (2492, 7990), (2632, 7565), (3026, 6580), (3115, 6392), (3196, 6230), (3290, 6052), (3560, 5593), (3995, 4984), (4183, 4760)]