21488810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 25789270

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 70, 95, 107, 133, 151, 190, 214, 266, 302, 535, 665, 749, 755, 1057, 1070, 1330, 1498, 1510, 2033, 2114, 2869, 3745, 4066, 5285, 5738, 7490, 10165, 10570, 14231, 14345, 16157, 20083, 20330, 28462, 28690, 32314, 40166, 71155, 80785, 100415, 113099, 142310, 161570, 200830, 226198, 306983, 565495, 613966, 1130990, 1534915, 2148881, 3069830, 4297762, 10744405, 21488810]

約数ペア:

[(1, 21488810), (2, 10744405), (5, 4297762), (7, 3069830), (10, 2148881), (14, 1534915), (19, 1130990), (35, 613966), (38, 565495), (70, 306983), (95, 226198), (107, 200830), (133, 161570), (151, 142310), (190, 113099), (214, 100415), (266, 80785), (302, 71155), (535, 40166), (665, 32314), (749, 28690), (755, 28462), (1057, 20330), (1070, 20083), (1330, 16157), (1498, 14345), (1510, 14231), (2033, 10570), (2114, 10165), (2869, 7490), (3745, 5738), (4066, 5285)]