20938140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1307}}^1$

素因数の和:1411

約数の個数: 72

約数和(自身を含む): 64275120

約数和(自身を除く): 43336980

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1307, 1335, 1602, 1780, 2614, 2670, 3204, 3921, 4005, 5228, 5340, 6535, 7842, 8010, 11763, 13070, 15684, 16020, 19605, 23526, 26140, 39210, 47052, 58815, 78420, 116323, 117630, 232646, 235260, 348969, 465292, 581615, 697938, 1046907, 1163230, 1395876, 1744845, 2093814, 2326460, 3489690, 4187628, 5234535, 6979380, 10469070, 20938140]

約数ペア:

[(1, 20938140), (2, 10469070), (3, 6979380), (4, 5234535), (5, 4187628), (6, 3489690), (9, 2326460), (10, 2093814), (12, 1744845), (15, 1395876), (18, 1163230), (20, 1046907), (30, 697938), (36, 581615), (45, 465292), (60, 348969), (89, 235260), (90, 232646), (178, 117630), (180, 116323), (267, 78420), (356, 58815), (445, 47052), (534, 39210), (801, 26140), (890, 23526), (1068, 19605), (1307, 16020), (1335, 15684), (1602, 13070), (1780, 11763), (2614, 8010), (2670, 7842), (3204, 6535), (3921, 5340), (4005, 5228)]