20921520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{179}}^1\times {\mathrm{487}}^1$

素因数の和:682

約数の個数: 80

約数和(自身を含む): 65352960

約数和(自身を除く): 44431440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 179, 240, 358, 487, 537, 716, 895, 974, 1074, 1432, 1461, 1790, 1948, 2148, 2435, 2685, 2864, 2922, 3580, 3896, 4296, 4870, 5370, 5844, 7160, 7305, 7792, 8592, 9740, 10740, 11688, 14320, 14610, 19480, 21480, 23376, 29220, 38960, 42960, 58440, 87173, 116880, 174346, 261519, 348692, 435865, 523038, 697384, 871730, 1046076, 1307595, 1394768, 1743460, 2092152, 2615190, 3486920, 4184304, 5230380, 6973840, 10460760, 20921520]

約数ペア:

[(1, 20921520), (2, 10460760), (3, 6973840), (4, 5230380), (5, 4184304), (6, 3486920), (8, 2615190), (10, 2092152), (12, 1743460), (15, 1394768), (16, 1307595), (20, 1046076), (24, 871730), (30, 697384), (40, 523038), (48, 435865), (60, 348692), (80, 261519), (120, 174346), (179, 116880), (240, 87173), (358, 58440), (487, 42960), (537, 38960), (716, 29220), (895, 23376), (974, 21480), (1074, 19480), (1432, 14610), (1461, 14320), (1790, 11688), (1948, 10740), (2148, 9740), (2435, 8592), (2685, 7792), (2864, 7305), (2922, 7160), (3580, 5844), (3896, 5370), (4296, 4870)]