80971280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{113}}^1$

素因数の和:205

約数の個数: 120

約数和(自身を含む): 209537928

約数和(自身を除く): 128566648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 53, 65, 80, 104, 106, 113, 130, 169, 208, 212, 226, 260, 265, 338, 424, 452, 520, 530, 565, 676, 689, 845, 848, 904, 1040, 1060, 1130, 1352, 1378, 1469, 1690, 1808, 2120, 2260, 2704, 2756, 2938, 3380, 3445, 4240, 4520, 5512, 5876, 5989, 6760, 6890, 7345, 8957, 9040, 11024, 11752, 11978, 13520, 13780, 14690, 17914, 19097, 23504, 23956, 27560, 29380, 29945, 35828, 38194, 44785, 47912, 55120, 58760, 59890, 71656, 76388, 77857, 89570, 95485, 95824, 117520, 119780, 143312, 152776, 155714, 179140, 190970, 239560, 305552, 311428, 358280, 381940, 389285, 479120, 622856, 716560, 763880, 778570, 1012141, 1245712, 1527760, 1557140, 2024282, 3114280, 4048564, 5060705, 6228560, 8097128, 10121410, 16194256, 20242820, 40485640, 80971280]

約数ペア:

[(1, 80971280), (2, 40485640), (4, 20242820), (5, 16194256), (8, 10121410), (10, 8097128), (13, 6228560), (16, 5060705), (20, 4048564), (26, 3114280), (40, 2024282), (52, 1557140), (53, 1527760), (65, 1245712), (80, 1012141), (104, 778570), (106, 763880), (113, 716560), (130, 622856), (169, 479120), (208, 389285), (212, 381940), (226, 358280), (260, 311428), (265, 305552), (338, 239560), (424, 190970), (452, 179140), (520, 155714), (530, 152776), (565, 143312), (676, 119780), (689, 117520), (845, 95824), (848, 95485), (904, 89570), (1040, 77857), (1060, 76388), (1130, 71656), (1352, 59890), (1378, 58760), (1469, 55120), (1690, 47912), (1808, 44785), (2120, 38194), (2260, 35828), (2704, 29945), (2756, 29380), (2938, 27560), (3380, 23956), (3445, 23504), (4240, 19097), (4520, 17914), (5512, 14690), (5876, 13780), (5989, 13520), (6760, 11978), (6890, 11752), (7345, 11024), (8957, 9040)]