21208140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{1997}}^1$

素因数の和:2071

約数の個数: 72

約数和(自身を含む): 65454480

約数和(自身を除く): 44246340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 59, 60, 90, 118, 177, 180, 236, 295, 354, 531, 590, 708, 885, 1062, 1180, 1770, 1997, 2124, 2655, 3540, 3994, 5310, 5991, 7988, 9985, 10620, 11982, 17973, 19970, 23964, 29955, 35946, 39940, 59910, 71892, 89865, 117823, 119820, 179730, 235646, 353469, 359460, 471292, 589115, 706938, 1060407, 1178230, 1413876, 1767345, 2120814, 2356460, 3534690, 4241628, 5302035, 7069380, 10604070, 21208140]

約数ペア:

[(1, 21208140), (2, 10604070), (3, 7069380), (4, 5302035), (5, 4241628), (6, 3534690), (9, 2356460), (10, 2120814), (12, 1767345), (15, 1413876), (18, 1178230), (20, 1060407), (30, 706938), (36, 589115), (45, 471292), (59, 359460), (60, 353469), (90, 235646), (118, 179730), (177, 119820), (180, 117823), (236, 89865), (295, 71892), (354, 59910), (531, 39940), (590, 35946), (708, 29955), (885, 23964), (1062, 19970), (1180, 17973), (1770, 11982), (1997, 10620), (2124, 9985), (2655, 7988), (3540, 5991), (3994, 5310)]