21891230

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{137}}^1$

素因数の和:221

約数の個数: 48

約数和(自身を含む): 43271280

約数和(自身を除く): 21380050

約数列:

[1, 2, 5, 10, 19, 29, 38, 58, 95, 137, 145, 190, 274, 290, 551, 685, 841, 1102, 1370, 1682, 2603, 2755, 3973, 4205, 5206, 5510, 7946, 8410, 13015, 15979, 19865, 26030, 31958, 39730, 75487, 79895, 115217, 150974, 159790, 230434, 377435, 576085, 754870, 1152170, 2189123, 4378246, 10945615, 21891230]

約数ペア:

[(1, 21891230), (2, 10945615), (5, 4378246), (10, 2189123), (19, 1152170), (29, 754870), (38, 576085), (58, 377435), (95, 230434), (137, 159790), (145, 150974), (190, 115217), (274, 79895), (290, 75487), (551, 39730), (685, 31958), (841, 26030), (1102, 19865), (1370, 15979), (1682, 13015), (2603, 8410), (2755, 7946), (3973, 5510), (4205, 5206)]