21978402

素因数分解:

$2^1\times 3^1\times {\mathrm{19}}^2\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:255

約数の個数: 48

約数和(自身を含む): 47365920

約数和(自身を除く): 25387518

約数列:

[1, 2, 3, 6, 19, 38, 57, 73, 114, 139, 146, 219, 278, 361, 417, 438, 722, 834, 1083, 1387, 2166, 2641, 2774, 4161, 5282, 7923, 8322, 10147, 15846, 20294, 26353, 30441, 50179, 52706, 60882, 79059, 100358, 150537, 158118, 192793, 301074, 385586, 578379, 1156758, 3663067, 7326134, 10989201, 21978402]

約数ペア:

[(1, 21978402), (2, 10989201), (3, 7326134), (6, 3663067), (19, 1156758), (38, 578379), (57, 385586), (73, 301074), (114, 192793), (139, 158118), (146, 150537), (219, 100358), (278, 79059), (361, 60882), (417, 52706), (438, 50179), (722, 30441), (834, 26353), (1083, 20294), (1387, 15846), (2166, 10147), (2641, 8322), (2774, 7923), (4161, 5282)]