20428380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{523}}^1$

素因数の和:576

約数の個数: 144

約数和(自身を含む): 73242624

約数和(自身を除く): 52814244

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 31, 35, 36, 42, 45, 60, 62, 63, 70, 84, 90, 93, 105, 124, 126, 140, 155, 180, 186, 210, 217, 252, 279, 310, 315, 372, 420, 434, 465, 523, 558, 620, 630, 651, 868, 930, 1046, 1085, 1116, 1260, 1302, 1395, 1569, 1860, 1953, 2092, 2170, 2604, 2615, 2790, 3138, 3255, 3661, 3906, 4340, 4707, 5230, 5580, 6276, 6510, 7322, 7812, 7845, 9414, 9765, 10460, 10983, 13020, 14644, 15690, 16213, 18305, 18828, 19530, 21966, 23535, 31380, 32426, 32949, 36610, 39060, 43932, 47070, 48639, 54915, 64852, 65898, 73220, 81065, 94140, 97278, 109830, 113491, 131796, 145917, 162130, 164745, 194556, 219660, 226982, 243195, 291834, 324260, 329490, 340473, 453964, 486390, 567455, 583668, 658980, 680946, 729585, 972780, 1021419, 1134910, 1361892, 1459170, 1702365, 2042838, 2269820, 2918340, 3404730, 4085676, 5107095, 6809460, 10214190, 20428380]

約数ペア:

[(1, 20428380), (2, 10214190), (3, 6809460), (4, 5107095), (5, 4085676), (6, 3404730), (7, 2918340), (9, 2269820), (10, 2042838), (12, 1702365), (14, 1459170), (15, 1361892), (18, 1134910), (20, 1021419), (21, 972780), (28, 729585), (30, 680946), (31, 658980), (35, 583668), (36, 567455), (42, 486390), (45, 453964), (60, 340473), (62, 329490), (63, 324260), (70, 291834), (84, 243195), (90, 226982), (93, 219660), (105, 194556), (124, 164745), (126, 162130), (140, 145917), (155, 131796), (180, 113491), (186, 109830), (210, 97278), (217, 94140), (252, 81065), (279, 73220), (310, 65898), (315, 64852), (372, 54915), (420, 48639), (434, 47070), (465, 43932), (523, 39060), (558, 36610), (620, 32949), (630, 32426), (651, 31380), (868, 23535), (930, 21966), (1046, 19530), (1085, 18828), (1116, 18305), (1260, 16213), (1302, 15690), (1395, 14644), (1569, 13020), (1860, 10983), (1953, 10460), (2092, 9765), (2170, 9414), (2604, 7845), (2615, 7812), (2790, 7322), (3138, 6510), (3255, 6276), (3661, 5580), (3906, 5230), (4340, 4707)]