131201920

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:456

約数の個数: 128

約数和(自身を含む): 343699200

約数和(自身を除く): 212497280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 64, 68, 80, 85, 124, 128, 136, 155, 160, 170, 248, 272, 310, 320, 340, 389, 496, 527, 544, 620, 640, 680, 778, 992, 1054, 1088, 1240, 1360, 1556, 1945, 1984, 2108, 2176, 2480, 2635, 2720, 3112, 3890, 3968, 4216, 4960, 5270, 5440, 6224, 6613, 7780, 8432, 9920, 10540, 10880, 12059, 12448, 13226, 15560, 16864, 19840, 21080, 24118, 24896, 26452, 31120, 33065, 33728, 42160, 48236, 49792, 52904, 60295, 62240, 66130, 67456, 84320, 96472, 105808, 120590, 124480, 132260, 168640, 192944, 205003, 211616, 241180, 248960, 264520, 337280, 385888, 410006, 423232, 482360, 529040, 771776, 820012, 846464, 964720, 1025015, 1058080, 1543552, 1640024, 1929440, 2050030, 2116160, 3280048, 3858880, 4100060, 4232320, 6560096, 7717760, 8200120, 13120192, 16400240, 26240384, 32800480, 65600960, 131201920]

約数ペア:

[(1, 131201920), (2, 65600960), (4, 32800480), (5, 26240384), (8, 16400240), (10, 13120192), (16, 8200120), (17, 7717760), (20, 6560096), (31, 4232320), (32, 4100060), (34, 3858880), (40, 3280048), (62, 2116160), (64, 2050030), (68, 1929440), (80, 1640024), (85, 1543552), (124, 1058080), (128, 1025015), (136, 964720), (155, 846464), (160, 820012), (170, 771776), (248, 529040), (272, 482360), (310, 423232), (320, 410006), (340, 385888), (389, 337280), (496, 264520), (527, 248960), (544, 241180), (620, 211616), (640, 205003), (680, 192944), (778, 168640), (992, 132260), (1054, 124480), (1088, 120590), (1240, 105808), (1360, 96472), (1556, 84320), (1945, 67456), (1984, 66130), (2108, 62240), (2176, 60295), (2480, 52904), (2635, 49792), (2720, 48236), (3112, 42160), (3890, 33728), (3968, 33065), (4216, 31120), (4960, 26452), (5270, 24896), (5440, 24118), (6224, 21080), (6613, 19840), (7780, 16864), (8432, 15560), (9920, 13226), (10540, 12448), (10880, 12059)]