21237540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1481}}^1$

素因数の和:1732

約数の個数: 48

約数和(自身を含む): 59754240

約数和(自身を除く): 38516700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 239, 478, 717, 956, 1195, 1434, 1481, 2390, 2868, 2962, 3585, 4443, 4780, 5924, 7170, 7405, 8886, 14340, 14810, 17772, 22215, 29620, 44430, 88860, 353959, 707918, 1061877, 1415836, 1769795, 2123754, 3539590, 4247508, 5309385, 7079180, 10618770, 21237540]

約数ペア:

[(1, 21237540), (2, 10618770), (3, 7079180), (4, 5309385), (5, 4247508), (6, 3539590), (10, 2123754), (12, 1769795), (15, 1415836), (20, 1061877), (30, 707918), (60, 353959), (239, 88860), (478, 44430), (717, 29620), (956, 22215), (1195, 17772), (1434, 14810), (1481, 14340), (2390, 8886), (2868, 7405), (2962, 7170), (3585, 5924), (4443, 4780)]