21403785

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:202

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18513015

約数列:

[1, 3, 5, 13, 15, 19, 39, 53, 57, 65, 95, 109, 159, 195, 247, 265, 285, 327, 545, 689, 741, 795, 1007, 1235, 1417, 1635, 2067, 2071, 3021, 3445, 3705, 4251, 5035, 5777, 6213, 7085, 10335, 10355, 13091, 15105, 17331, 21255, 26923, 28885, 31065, 39273, 65455, 75101, 80769, 86655, 109763, 134615, 196365, 225303, 329289, 375505, 403845, 548815, 1126515, 1426919, 1646445, 4280757, 7134595, 21403785]

約数ペア:

[(1, 21403785), (3, 7134595), (5, 4280757), (13, 1646445), (15, 1426919), (19, 1126515), (39, 548815), (53, 403845), (57, 375505), (65, 329289), (95, 225303), (109, 196365), (159, 134615), (195, 109763), (247, 86655), (265, 80769), (285, 75101), (327, 65455), (545, 39273), (689, 31065), (741, 28885), (795, 26923), (1007, 21255), (1235, 17331), (1417, 15105), (1635, 13091), (2067, 10355), (2071, 10335), (3021, 7085), (3445, 6213), (3705, 5777), (4251, 5035)]