19870140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{61}}^2\times {\mathrm{89}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 57198960

約数和(自身を除く): 37328820

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 61, 89, 122, 178, 183, 244, 267, 305, 356, 366, 445, 534, 610, 732, 890, 915, 1068, 1220, 1335, 1780, 1830, 2670, 3660, 3721, 5340, 5429, 7442, 10858, 11163, 14884, 16287, 18605, 21716, 22326, 27145, 32574, 37210, 44652, 54290, 55815, 65148, 74420, 81435, 108580, 111630, 162870, 223260, 325740, 331169, 662338, 993507, 1324676, 1655845, 1987014, 3311690, 3974028, 4967535, 6623380, 9935070, 19870140]

約数ペア:

[(1, 19870140), (2, 9935070), (3, 6623380), (4, 4967535), (5, 3974028), (6, 3311690), (10, 1987014), (12, 1655845), (15, 1324676), (20, 993507), (30, 662338), (60, 331169), (61, 325740), (89, 223260), (122, 162870), (178, 111630), (183, 108580), (244, 81435), (267, 74420), (305, 65148), (356, 55815), (366, 54290), (445, 44652), (534, 37210), (610, 32574), (732, 27145), (890, 22326), (915, 21716), (1068, 18605), (1220, 16287), (1335, 14884), (1780, 11163), (1830, 10858), (2670, 7442), (3660, 5429), (3721, 5340)]