21425460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{367}}^1$

素因数の和:525

約数の個数: 96

約数和(自身を含む): 69242880

約数和(自身を除く): 47817420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 139, 140, 210, 278, 367, 417, 420, 556, 695, 734, 834, 973, 1101, 1390, 1468, 1668, 1835, 1946, 2085, 2202, 2569, 2780, 2919, 3670, 3892, 4170, 4404, 4865, 5138, 5505, 5838, 7340, 7707, 8340, 9730, 10276, 11010, 11676, 12845, 14595, 15414, 19460, 22020, 25690, 29190, 30828, 38535, 51013, 51380, 58380, 77070, 102026, 153039, 154140, 204052, 255065, 306078, 357091, 510130, 612156, 714182, 765195, 1020260, 1071273, 1428364, 1530390, 1785455, 2142546, 3060780, 3570910, 4285092, 5356365, 7141820, 10712730, 21425460]

約数ペア:

[(1, 21425460), (2, 10712730), (3, 7141820), (4, 5356365), (5, 4285092), (6, 3570910), (7, 3060780), (10, 2142546), (12, 1785455), (14, 1530390), (15, 1428364), (20, 1071273), (21, 1020260), (28, 765195), (30, 714182), (35, 612156), (42, 510130), (60, 357091), (70, 306078), (84, 255065), (105, 204052), (139, 154140), (140, 153039), (210, 102026), (278, 77070), (367, 58380), (417, 51380), (420, 51013), (556, 38535), (695, 30828), (734, 29190), (834, 25690), (973, 22020), (1101, 19460), (1390, 15414), (1468, 14595), (1668, 12845), (1835, 11676), (1946, 11010), (2085, 10276), (2202, 9730), (2569, 8340), (2780, 7707), (2919, 7340), (3670, 5838), (3892, 5505), (4170, 5138), (4404, 4865)]