21488460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7309}}^1$

素因数の和:7335

約数の個数: 72

約数和(自身を含む): 70000560

約数和(自身を除く): 48512100

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7309, 14618, 21927, 29236, 36545, 43854, 51163, 73090, 87708, 102326, 109635, 146180, 153489, 204652, 219270, 255815, 306978, 358141, 438540, 511630, 613956, 716282, 767445, 1023260, 1074423, 1432564, 1534890, 1790705, 2148846, 3069780, 3581410, 4297692, 5372115, 7162820, 10744230, 21488460]

約数ペア:

[(1, 21488460), (2, 10744230), (3, 7162820), (4, 5372115), (5, 4297692), (6, 3581410), (7, 3069780), (10, 2148846), (12, 1790705), (14, 1534890), (15, 1432564), (20, 1074423), (21, 1023260), (28, 767445), (30, 716282), (35, 613956), (42, 511630), (49, 438540), (60, 358141), (70, 306978), (84, 255815), (98, 219270), (105, 204652), (140, 153489), (147, 146180), (196, 109635), (210, 102326), (245, 87708), (294, 73090), (420, 51163), (490, 43854), (588, 36545), (735, 29236), (980, 21927), (1470, 14618), (2940, 7309)]