21691635

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:248

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 20886285

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 83, 95, 105, 131, 133, 249, 285, 393, 399, 415, 581, 655, 665, 917, 1245, 1577, 1743, 1965, 1995, 2489, 2751, 2905, 4585, 4731, 7467, 7885, 8715, 10873, 11039, 12445, 13755, 17423, 23655, 32619, 33117, 37335, 52269, 54365, 55195, 76111, 87115, 163095, 165585, 206587, 228333, 261345, 380555, 619761, 1032935, 1141665, 1446109, 3098805, 4338327, 7230545, 21691635]

約数ペア:

[(1, 21691635), (3, 7230545), (5, 4338327), (7, 3098805), (15, 1446109), (19, 1141665), (21, 1032935), (35, 619761), (57, 380555), (83, 261345), (95, 228333), (105, 206587), (131, 165585), (133, 163095), (249, 87115), (285, 76111), (393, 55195), (399, 54365), (415, 52269), (581, 37335), (655, 33117), (665, 32619), (917, 23655), (1245, 17423), (1577, 13755), (1743, 12445), (1965, 11039), (1995, 10873), (2489, 8715), (2751, 7885), (2905, 7467), (4585, 4731)]