19917310

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:265

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 23628290

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 89, 115, 139, 161, 178, 230, 278, 322, 445, 623, 695, 805, 890, 973, 1246, 1390, 1610, 1946, 2047, 3115, 3197, 4094, 4865, 6230, 6394, 9730, 10235, 12371, 14329, 15985, 20470, 22379, 24742, 28658, 31970, 44758, 61855, 71645, 86597, 111895, 123710, 143290, 173194, 223790, 284533, 432985, 569066, 865970, 1422665, 1991731, 2845330, 3983462, 9958655, 19917310]

約数ペア:

[(1, 19917310), (2, 9958655), (5, 3983462), (7, 2845330), (10, 1991731), (14, 1422665), (23, 865970), (35, 569066), (46, 432985), (70, 284533), (89, 223790), (115, 173194), (139, 143290), (161, 123710), (178, 111895), (230, 86597), (278, 71645), (322, 61855), (445, 44758), (623, 31970), (695, 28658), (805, 24742), (890, 22379), (973, 20470), (1246, 15985), (1390, 14329), (1610, 12371), (1946, 10235), (2047, 9730), (3115, 6394), (3197, 6230), (4094, 4865)]