21481080

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:261

約数の個数: 128

約数和(自身を含む): 69189120

約数和(自身を除く): 47708040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 43, 46, 60, 69, 86, 92, 115, 120, 129, 138, 172, 181, 184, 215, 230, 258, 276, 344, 345, 362, 430, 460, 516, 543, 552, 645, 690, 724, 860, 905, 920, 989, 1032, 1086, 1290, 1380, 1448, 1720, 1810, 1978, 2172, 2580, 2715, 2760, 2967, 3620, 3956, 4163, 4344, 4945, 5160, 5430, 5934, 7240, 7783, 7912, 8326, 9890, 10860, 11868, 12489, 14835, 15566, 16652, 19780, 20815, 21720, 23349, 23736, 24978, 29670, 31132, 33304, 38915, 39560, 41630, 46698, 49956, 59340, 62264, 62445, 77830, 83260, 93396, 99912, 116745, 118680, 124890, 155660, 166520, 179009, 186792, 233490, 249780, 311320, 358018, 466980, 499560, 537027, 716036, 895045, 933960, 1074054, 1432072, 1790090, 2148108, 2685135, 3580180, 4296216, 5370270, 7160360, 10740540, 21481080]

約数ペア:

[(1, 21481080), (2, 10740540), (3, 7160360), (4, 5370270), (5, 4296216), (6, 3580180), (8, 2685135), (10, 2148108), (12, 1790090), (15, 1432072), (20, 1074054), (23, 933960), (24, 895045), (30, 716036), (40, 537027), (43, 499560), (46, 466980), (60, 358018), (69, 311320), (86, 249780), (92, 233490), (115, 186792), (120, 179009), (129, 166520), (138, 155660), (172, 124890), (181, 118680), (184, 116745), (215, 99912), (230, 93396), (258, 83260), (276, 77830), (344, 62445), (345, 62264), (362, 59340), (430, 49956), (460, 46698), (516, 41630), (543, 39560), (552, 38915), (645, 33304), (690, 31132), (724, 29670), (860, 24978), (905, 23736), (920, 23349), (989, 21720), (1032, 20815), (1086, 19780), (1290, 16652), (1380, 15566), (1448, 14835), (1720, 12489), (1810, 11868), (1978, 10860), (2172, 9890), (2580, 8326), (2715, 7912), (2760, 7783), (2967, 7240), (3620, 5934), (3956, 5430), (4163, 5160), (4344, 4945)]