21491784

素因数分解:

$2^3\times 3^3\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:164

約数の個数: 128

約数和(自身を含む): 63936000

約数和(自身を除く): 42444216

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 29, 36, 47, 54, 58, 72, 73, 87, 94, 108, 116, 141, 146, 174, 188, 216, 219, 232, 261, 282, 292, 348, 376, 423, 438, 522, 564, 584, 657, 696, 783, 846, 876, 1044, 1128, 1269, 1314, 1363, 1566, 1692, 1752, 1971, 2088, 2117, 2538, 2628, 2726, 3132, 3384, 3431, 3942, 4089, 4234, 5076, 5256, 5452, 6264, 6351, 6862, 7884, 8178, 8468, 10152, 10293, 10904, 12267, 12702, 13724, 15768, 16356, 16936, 19053, 20586, 24534, 25404, 27448, 30879, 32712, 36801, 38106, 41172, 49068, 50808, 57159, 61758, 73602, 76212, 82344, 92637, 98136, 99499, 114318, 123516, 147204, 152424, 185274, 198998, 228636, 247032, 294408, 298497, 370548, 397996, 457272, 596994, 741096, 795992, 895491, 1193988, 1790982, 2387976, 2686473, 3581964, 5372946, 7163928, 10745892, 21491784]

約数ペア:

[(1, 21491784), (2, 10745892), (3, 7163928), (4, 5372946), (6, 3581964), (8, 2686473), (9, 2387976), (12, 1790982), (18, 1193988), (24, 895491), (27, 795992), (29, 741096), (36, 596994), (47, 457272), (54, 397996), (58, 370548), (72, 298497), (73, 294408), (87, 247032), (94, 228636), (108, 198998), (116, 185274), (141, 152424), (146, 147204), (174, 123516), (188, 114318), (216, 99499), (219, 98136), (232, 92637), (261, 82344), (282, 76212), (292, 73602), (348, 61758), (376, 57159), (423, 50808), (438, 49068), (522, 41172), (564, 38106), (584, 36801), (657, 32712), (696, 30879), (783, 27448), (846, 25404), (876, 24534), (1044, 20586), (1128, 19053), (1269, 16936), (1314, 16356), (1363, 15768), (1566, 13724), (1692, 12702), (1752, 12267), (1971, 10904), (2088, 10293), (2117, 10152), (2538, 8468), (2628, 8178), (2726, 7884), (3132, 6862), (3384, 6351), (3431, 6264), (3942, 5452), (4089, 5256), (4234, 5076)]