21331980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3203}}^1$

素因数の和:3255

約数の個数: 72

約数和(自身を含む): 66476592

約数和(自身を除く): 45144612

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3203, 3330, 6406, 6660, 9609, 12812, 16015, 19218, 28827, 32030, 38436, 48045, 57654, 64060, 96090, 115308, 118511, 144135, 192180, 237022, 288270, 355533, 474044, 576540, 592555, 711066, 1066599, 1185110, 1422132, 1777665, 2133198, 2370220, 3555330, 4266396, 5332995, 7110660, 10665990, 21331980]

約数ペア:

[(1, 21331980), (2, 10665990), (3, 7110660), (4, 5332995), (5, 4266396), (6, 3555330), (9, 2370220), (10, 2133198), (12, 1777665), (15, 1422132), (18, 1185110), (20, 1066599), (30, 711066), (36, 592555), (37, 576540), (45, 474044), (60, 355533), (74, 288270), (90, 237022), (111, 192180), (148, 144135), (180, 118511), (185, 115308), (222, 96090), (333, 64060), (370, 57654), (444, 48045), (555, 38436), (666, 32030), (740, 28827), (1110, 19218), (1332, 16015), (1665, 12812), (2220, 9609), (3203, 6660), (3330, 6406)]