21123960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1231}}^1$

素因数の和:1269

約数の個数: 128

約数和(自身を含む): 74511360

約数和(自身を除く): 53387400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 20, 22, 24, 26, 30, 33, 39, 40, 44, 52, 55, 60, 65, 66, 78, 88, 104, 110, 120, 130, 132, 143, 156, 165, 195, 220, 260, 264, 286, 312, 330, 390, 429, 440, 520, 572, 660, 715, 780, 858, 1144, 1231, 1320, 1430, 1560, 1716, 2145, 2462, 2860, 3432, 3693, 4290, 4924, 5720, 6155, 7386, 8580, 9848, 12310, 13541, 14772, 16003, 17160, 18465, 24620, 27082, 29544, 32006, 36930, 40623, 48009, 49240, 54164, 64012, 67705, 73860, 80015, 81246, 96018, 108328, 128024, 135410, 147720, 160030, 162492, 176033, 192036, 203115, 240045, 270820, 320060, 324984, 352066, 384072, 406230, 480090, 528099, 541640, 640120, 704132, 812460, 880165, 960180, 1056198, 1408264, 1624920, 1760330, 1920360, 2112396, 2640495, 3520660, 4224792, 5280990, 7041320, 10561980, 21123960]

約数ペア:

[(1, 21123960), (2, 10561980), (3, 7041320), (4, 5280990), (5, 4224792), (6, 3520660), (8, 2640495), (10, 2112396), (11, 1920360), (12, 1760330), (13, 1624920), (15, 1408264), (20, 1056198), (22, 960180), (24, 880165), (26, 812460), (30, 704132), (33, 640120), (39, 541640), (40, 528099), (44, 480090), (52, 406230), (55, 384072), (60, 352066), (65, 324984), (66, 320060), (78, 270820), (88, 240045), (104, 203115), (110, 192036), (120, 176033), (130, 162492), (132, 160030), (143, 147720), (156, 135410), (165, 128024), (195, 108328), (220, 96018), (260, 81246), (264, 80015), (286, 73860), (312, 67705), (330, 64012), (390, 54164), (429, 49240), (440, 48009), (520, 40623), (572, 36930), (660, 32006), (715, 29544), (780, 27082), (858, 24620), (1144, 18465), (1231, 17160), (1320, 16003), (1430, 14772), (1560, 13541), (1716, 12310), (2145, 9848), (2462, 8580), (2860, 7386), (3432, 6155), (3693, 5720), (4290, 4924)]