21000279818

素因数分解:

$2^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1\times {\mathrm{1181}}^1$

素因数の和:1527

約数の個数: 64

約数和(自身を含む): 37080834048

約数和(自身を除く): 16080554230

約数列:

[1, 2, 7, 14, 73, 127, 137, 146, 254, 274, 511, 889, 959, 1022, 1181, 1778, 1918, 2362, 8267, 9271, 10001, 16534, 17399, 18542, 20002, 34798, 64897, 70007, 86213, 121793, 129794, 140014, 149987, 161797, 172426, 243586, 299974, 323594, 603491, 1049909, 1132579, 1206982, 1270127, 2099818, 2265158, 2540254, 8890889, 10949051, 11811181, 17781778, 20548219, 21898102, 23622362, 41096438, 76643357, 82678267, 143837533, 153286714, 165356534, 287675066, 1500019987, 3000039974, 10500139909, 21000279818]

約数ペア:

[(1, 21000279818), (2, 10500139909), (7, 3000039974), (14, 1500019987), (73, 287675066), (127, 165356534), (137, 153286714), (146, 143837533), (254, 82678267), (274, 76643357), (511, 41096438), (889, 23622362), (959, 21898102), (1022, 20548219), (1181, 17781778), (1778, 11811181), (1918, 10949051), (2362, 8890889), (8267, 2540254), (9271, 2265158), (10001, 2099818), (16534, 1270127), (17399, 1206982), (18542, 1132579), (20002, 1049909), (34798, 603491), (64897, 323594), (70007, 299974), (86213, 243586), (121793, 172426), (129794, 161797), (140014, 149987)]