81371360

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:233

約数の個数: 144

約数和(自身を含む): 228042864

約数和(自身を除く): 146671504

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 97, 98, 107, 112, 140, 160, 194, 196, 214, 224, 245, 280, 388, 392, 428, 485, 490, 535, 560, 679, 749, 776, 784, 856, 970, 980, 1070, 1120, 1358, 1498, 1552, 1568, 1712, 1940, 1960, 2140, 2716, 2996, 3104, 3395, 3424, 3745, 3880, 3920, 4280, 4753, 5243, 5432, 5992, 6790, 7490, 7760, 7840, 8560, 9506, 10379, 10486, 10864, 11984, 13580, 14980, 15520, 17120, 19012, 20758, 20972, 21728, 23765, 23968, 26215, 27160, 29960, 38024, 41516, 41944, 47530, 51895, 52430, 54320, 59920, 72653, 76048, 83032, 83888, 95060, 103790, 104860, 108640, 119840, 145306, 152096, 166064, 167776, 190120, 207580, 209720, 290612, 332128, 363265, 380240, 415160, 419440, 508571, 581224, 726530, 760480, 830320, 838880, 1017142, 1162448, 1453060, 1660640, 2034284, 2324896, 2542855, 2906120, 4068568, 5085710, 5812240, 8137136, 10171420, 11624480, 16274272, 20342840, 40685680, 81371360]

約数ペア:

[(1, 81371360), (2, 40685680), (4, 20342840), (5, 16274272), (7, 11624480), (8, 10171420), (10, 8137136), (14, 5812240), (16, 5085710), (20, 4068568), (28, 2906120), (32, 2542855), (35, 2324896), (40, 2034284), (49, 1660640), (56, 1453060), (70, 1162448), (80, 1017142), (97, 838880), (98, 830320), (107, 760480), (112, 726530), (140, 581224), (160, 508571), (194, 419440), (196, 415160), (214, 380240), (224, 363265), (245, 332128), (280, 290612), (388, 209720), (392, 207580), (428, 190120), (485, 167776), (490, 166064), (535, 152096), (560, 145306), (679, 119840), (749, 108640), (776, 104860), (784, 103790), (856, 95060), (970, 83888), (980, 83032), (1070, 76048), (1120, 72653), (1358, 59920), (1498, 54320), (1552, 52430), (1568, 51895), (1712, 47530), (1940, 41944), (1960, 41516), (2140, 38024), (2716, 29960), (2996, 27160), (3104, 26215), (3395, 23968), (3424, 23765), (3745, 21728), (3880, 20972), (3920, 20758), (4280, 19012), (4753, 17120), (5243, 15520), (5432, 14980), (5992, 13580), (6790, 11984), (7490, 10864), (7760, 10486), (7840, 10379), (8560, 9506)]