81239440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:177

約数の個数: 120

約数和(自身を含む): 208346040

約数和(自身を除く): 127106600

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 38, 40, 58, 76, 80, 95, 97, 116, 145, 152, 190, 194, 232, 290, 304, 361, 380, 388, 464, 485, 551, 580, 722, 760, 776, 970, 1102, 1160, 1444, 1520, 1552, 1805, 1843, 1940, 2204, 2320, 2755, 2813, 2888, 3610, 3686, 3880, 4408, 5510, 5626, 5776, 7220, 7372, 7760, 8816, 9215, 10469, 11020, 11252, 14065, 14440, 14744, 18430, 20938, 22040, 22504, 28130, 28880, 29488, 35017, 36860, 41876, 44080, 45008, 52345, 53447, 56260, 70034, 73720, 83752, 104690, 106894, 112520, 140068, 147440, 167504, 175085, 209380, 213788, 225040, 267235, 280136, 350170, 418760, 427576, 534470, 560272, 700340, 837520, 855152, 1015493, 1068940, 1400680, 2030986, 2137880, 2801360, 4061972, 4275760, 5077465, 8123944, 10154930, 16247888, 20309860, 40619720, 81239440]

約数ペア:

[(1, 81239440), (2, 40619720), (4, 20309860), (5, 16247888), (8, 10154930), (10, 8123944), (16, 5077465), (19, 4275760), (20, 4061972), (29, 2801360), (38, 2137880), (40, 2030986), (58, 1400680), (76, 1068940), (80, 1015493), (95, 855152), (97, 837520), (116, 700340), (145, 560272), (152, 534470), (190, 427576), (194, 418760), (232, 350170), (290, 280136), (304, 267235), (361, 225040), (380, 213788), (388, 209380), (464, 175085), (485, 167504), (551, 147440), (580, 140068), (722, 112520), (760, 106894), (776, 104690), (970, 83752), (1102, 73720), (1160, 70034), (1444, 56260), (1520, 53447), (1552, 52345), (1805, 45008), (1843, 44080), (1940, 41876), (2204, 36860), (2320, 35017), (2755, 29488), (2813, 28880), (2888, 28130), (3610, 22504), (3686, 22040), (3880, 20938), (4408, 18430), (5510, 14744), (5626, 14440), (5776, 14065), (7220, 11252), (7372, 11020), (7760, 10469), (8816, 9215)]