21481380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{911}}^1$

素因数の和:1057

約数の個数: 72

約数和(自身を含む): 65729664

約数和(自身を除く): 44248284

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 131, 180, 262, 393, 524, 655, 786, 911, 1179, 1310, 1572, 1822, 1965, 2358, 2620, 2733, 3644, 3930, 4555, 4716, 5466, 5895, 7860, 8199, 9110, 10932, 11790, 13665, 16398, 18220, 23580, 27330, 32796, 40995, 54660, 81990, 119341, 163980, 238682, 358023, 477364, 596705, 716046, 1074069, 1193410, 1432092, 1790115, 2148138, 2386820, 3580230, 4296276, 5370345, 7160460, 10740690, 21481380]

約数ペア:

[(1, 21481380), (2, 10740690), (3, 7160460), (4, 5370345), (5, 4296276), (6, 3580230), (9, 2386820), (10, 2148138), (12, 1790115), (15, 1432092), (18, 1193410), (20, 1074069), (30, 716046), (36, 596705), (45, 477364), (60, 358023), (90, 238682), (131, 163980), (180, 119341), (262, 81990), (393, 54660), (524, 40995), (655, 32796), (786, 27330), (911, 23580), (1179, 18220), (1310, 16398), (1572, 13665), (1822, 11790), (1965, 10932), (2358, 9110), (2620, 8199), (2733, 7860), (3644, 5895), (3930, 5466), (4555, 4716)]