20628020

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:158

約数の個数: 96

約数和(自身を含む): 52684800

約数和(自身を除く): 32056780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 97, 98, 124, 140, 155, 194, 196, 217, 245, 310, 343, 388, 434, 485, 490, 620, 679, 686, 868, 970, 980, 1085, 1358, 1372, 1519, 1715, 1940, 2170, 2716, 3007, 3038, 3395, 3430, 4340, 4753, 6014, 6076, 6790, 6860, 7595, 9506, 10633, 12028, 13580, 15035, 15190, 19012, 21049, 21266, 23765, 30070, 30380, 33271, 42098, 42532, 47530, 53165, 60140, 66542, 84196, 95060, 105245, 106330, 133084, 147343, 166355, 210490, 212660, 294686, 332710, 420980, 589372, 665420, 736715, 1031401, 1473430, 2062802, 2946860, 4125604, 5157005, 10314010, 20628020]

約数ペア:

[(1, 20628020), (2, 10314010), (4, 5157005), (5, 4125604), (7, 2946860), (10, 2062802), (14, 1473430), (20, 1031401), (28, 736715), (31, 665420), (35, 589372), (49, 420980), (62, 332710), (70, 294686), (97, 212660), (98, 210490), (124, 166355), (140, 147343), (155, 133084), (194, 106330), (196, 105245), (217, 95060), (245, 84196), (310, 66542), (343, 60140), (388, 53165), (434, 47530), (485, 42532), (490, 42098), (620, 33271), (679, 30380), (686, 30070), (868, 23765), (970, 21266), (980, 21049), (1085, 19012), (1358, 15190), (1372, 15035), (1519, 13580), (1715, 12028), (1940, 10633), (2170, 9506), (2716, 7595), (3007, 6860), (3038, 6790), (3395, 6076), (3430, 6014), (4340, 4753)]