21457380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1087}}^1$

素因数の和:1153

約数の個数: 96

約数和(自身を含む): 70189056

約数和(自身を除く): 48731676

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 47, 60, 70, 84, 94, 105, 140, 141, 188, 210, 235, 282, 329, 420, 470, 564, 658, 705, 940, 987, 1087, 1316, 1410, 1645, 1974, 2174, 2820, 3261, 3290, 3948, 4348, 4935, 5435, 6522, 6580, 7609, 9870, 10870, 13044, 15218, 16305, 19740, 21740, 22827, 30436, 32610, 38045, 45654, 51089, 65220, 76090, 91308, 102178, 114135, 152180, 153267, 204356, 228270, 255445, 306534, 357623, 456540, 510890, 613068, 715246, 766335, 1021780, 1072869, 1430492, 1532670, 1788115, 2145738, 3065340, 3576230, 4291476, 5364345, 7152460, 10728690, 21457380]

約数ペア:

[(1, 21457380), (2, 10728690), (3, 7152460), (4, 5364345), (5, 4291476), (6, 3576230), (7, 3065340), (10, 2145738), (12, 1788115), (14, 1532670), (15, 1430492), (20, 1072869), (21, 1021780), (28, 766335), (30, 715246), (35, 613068), (42, 510890), (47, 456540), (60, 357623), (70, 306534), (84, 255445), (94, 228270), (105, 204356), (140, 153267), (141, 152180), (188, 114135), (210, 102178), (235, 91308), (282, 76090), (329, 65220), (420, 51089), (470, 45654), (564, 38045), (658, 32610), (705, 30436), (940, 22827), (987, 21740), (1087, 19740), (1316, 16305), (1410, 15218), (1645, 13044), (1974, 10870), (2174, 9870), (2820, 7609), (3261, 6580), (3290, 6522), (3948, 5435), (4348, 4935)]