20918240

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{983}}^1$

素因数の和:1024

約数の個数: 96

約数和(自身を含む): 59512320

約数和(自身を除く): 38594080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 160, 190, 224, 266, 280, 304, 380, 532, 560, 608, 665, 760, 983, 1064, 1120, 1330, 1520, 1966, 2128, 2660, 3040, 3932, 4256, 4915, 5320, 6881, 7864, 9830, 10640, 13762, 15728, 18677, 19660, 21280, 27524, 31456, 34405, 37354, 39320, 55048, 68810, 74708, 78640, 93385, 110096, 130739, 137620, 149416, 157280, 186770, 220192, 261478, 275240, 298832, 373540, 522956, 550480, 597664, 653695, 747080, 1045912, 1100960, 1307390, 1494160, 2091824, 2614780, 2988320, 4183648, 5229560, 10459120, 20918240]

約数ペア:

[(1, 20918240), (2, 10459120), (4, 5229560), (5, 4183648), (7, 2988320), (8, 2614780), (10, 2091824), (14, 1494160), (16, 1307390), (19, 1100960), (20, 1045912), (28, 747080), (32, 653695), (35, 597664), (38, 550480), (40, 522956), (56, 373540), (70, 298832), (76, 275240), (80, 261478), (95, 220192), (112, 186770), (133, 157280), (140, 149416), (152, 137620), (160, 130739), (190, 110096), (224, 93385), (266, 78640), (280, 74708), (304, 68810), (380, 55048), (532, 39320), (560, 37354), (608, 34405), (665, 31456), (760, 27524), (983, 21280), (1064, 19660), (1120, 18677), (1330, 15728), (1520, 13762), (1966, 10640), (2128, 9830), (2660, 7864), (3040, 6881), (3932, 5320), (4256, 4915)]