20328560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1171}}^1$

素因数の和:1222

約数の個数: 80

約数和(自身を含む): 55805952

約数和(自身を除く): 35477392

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1171, 1240, 1736, 2170, 2342, 2480, 3472, 4340, 4684, 5855, 8197, 8680, 9368, 11710, 16394, 17360, 18736, 23420, 32788, 36301, 40985, 46840, 65576, 72602, 81970, 93680, 131152, 145204, 163940, 181505, 254107, 290408, 327880, 363010, 508214, 580816, 655760, 726020, 1016428, 1270535, 1452040, 2032856, 2541070, 2904080, 4065712, 5082140, 10164280, 20328560]

約数ペア:

[(1, 20328560), (2, 10164280), (4, 5082140), (5, 4065712), (7, 2904080), (8, 2541070), (10, 2032856), (14, 1452040), (16, 1270535), (20, 1016428), (28, 726020), (31, 655760), (35, 580816), (40, 508214), (56, 363010), (62, 327880), (70, 290408), (80, 254107), (112, 181505), (124, 163940), (140, 145204), (155, 131152), (217, 93680), (248, 81970), (280, 72602), (310, 65576), (434, 46840), (496, 40985), (560, 36301), (620, 32788), (868, 23420), (1085, 18736), (1171, 17360), (1240, 16394), (1736, 11710), (2170, 9368), (2342, 8680), (2480, 8197), (3472, 5855), (4340, 4684)]