21293440

素因数分解:

$2^7\times 5^1\times 7^3\times {\mathrm{97}}^1$

素因数の和:137

約数の個数: 128

約数和(自身を含む): 59976000

約数和(自身を除く): 38682560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 97, 98, 112, 128, 140, 160, 194, 196, 224, 245, 280, 320, 343, 388, 392, 448, 485, 490, 560, 640, 679, 686, 776, 784, 896, 970, 980, 1120, 1358, 1372, 1552, 1568, 1715, 1940, 1960, 2240, 2716, 2744, 3104, 3136, 3395, 3430, 3880, 3920, 4480, 4753, 5432, 5488, 6208, 6272, 6790, 6860, 7760, 7840, 9506, 10864, 10976, 12416, 13580, 13720, 15520, 15680, 19012, 21728, 21952, 23765, 27160, 27440, 31040, 31360, 33271, 38024, 43456, 43904, 47530, 54320, 54880, 62080, 66542, 76048, 86912, 95060, 108640, 109760, 133084, 152096, 166355, 190120, 217280, 219520, 266168, 304192, 332710, 380240, 434560, 532336, 608384, 665420, 760480, 1064672, 1330840, 1520960, 2129344, 2661680, 3041920, 4258688, 5323360, 10646720, 21293440]

約数ペア:

[(1, 21293440), (2, 10646720), (4, 5323360), (5, 4258688), (7, 3041920), (8, 2661680), (10, 2129344), (14, 1520960), (16, 1330840), (20, 1064672), (28, 760480), (32, 665420), (35, 608384), (40, 532336), (49, 434560), (56, 380240), (64, 332710), (70, 304192), (80, 266168), (97, 219520), (98, 217280), (112, 190120), (128, 166355), (140, 152096), (160, 133084), (194, 109760), (196, 108640), (224, 95060), (245, 86912), (280, 76048), (320, 66542), (343, 62080), (388, 54880), (392, 54320), (448, 47530), (485, 43904), (490, 43456), (560, 38024), (640, 33271), (679, 31360), (686, 31040), (776, 27440), (784, 27160), (896, 23765), (970, 21952), (980, 21728), (1120, 19012), (1358, 15680), (1372, 15520), (1552, 13720), (1568, 13580), (1715, 12416), (1940, 10976), (1960, 10864), (2240, 9506), (2716, 7840), (2744, 7760), (3104, 6860), (3136, 6790), (3395, 6272), (3430, 6208), (3880, 5488), (3920, 5432), (4480, 4753)]