19998300

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 144

約数和(自身を含む): 67495680

約数和(自身を除く): 47497380

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 89, 100, 105, 107, 140, 150, 175, 178, 210, 214, 267, 300, 321, 350, 356, 420, 428, 445, 525, 534, 535, 623, 642, 700, 749, 890, 1050, 1068, 1070, 1246, 1284, 1335, 1498, 1605, 1780, 1869, 2100, 2140, 2225, 2247, 2492, 2670, 2675, 2996, 3115, 3210, 3738, 3745, 4450, 4494, 5340, 5350, 6230, 6420, 6675, 7476, 7490, 8025, 8900, 8988, 9345, 9523, 10700, 11235, 12460, 13350, 14980, 15575, 16050, 18690, 18725, 19046, 22470, 26700, 28569, 31150, 32100, 37380, 37450, 38092, 44940, 46725, 47615, 56175, 57138, 62300, 66661, 74900, 93450, 95230, 112350, 114276, 133322, 142845, 186900, 190460, 199983, 224700, 238075, 266644, 285690, 333305, 399966, 476150, 571380, 666610, 714225, 799932, 952300, 999915, 1333220, 1428450, 1666525, 1999830, 2856900, 3333050, 3999660, 4999575, 6666100, 9999150, 19998300]

約数ペア:

[(1, 19998300), (2, 9999150), (3, 6666100), (4, 4999575), (5, 3999660), (6, 3333050), (7, 2856900), (10, 1999830), (12, 1666525), (14, 1428450), (15, 1333220), (20, 999915), (21, 952300), (25, 799932), (28, 714225), (30, 666610), (35, 571380), (42, 476150), (50, 399966), (60, 333305), (70, 285690), (75, 266644), (84, 238075), (89, 224700), (100, 199983), (105, 190460), (107, 186900), (140, 142845), (150, 133322), (175, 114276), (178, 112350), (210, 95230), (214, 93450), (267, 74900), (300, 66661), (321, 62300), (350, 57138), (356, 56175), (420, 47615), (428, 46725), (445, 44940), (525, 38092), (534, 37450), (535, 37380), (623, 32100), (642, 31150), (700, 28569), (749, 26700), (890, 22470), (1050, 19046), (1068, 18725), (1070, 18690), (1246, 16050), (1284, 15575), (1335, 14980), (1498, 13350), (1605, 12460), (1780, 11235), (1869, 10700), (2100, 9523), (2140, 9345), (2225, 8988), (2247, 8900), (2492, 8025), (2670, 7490), (2675, 7476), (2996, 6675), (3115, 6420), (3210, 6230), (3738, 5350), (3745, 5340), (4450, 4494)]