21291990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{503}}^1$

素因数の和:613

約数の個数: 64

約数和(自身を含む): 54867456

約数和(自身を除く): 33575466

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 30, 34, 51, 83, 85, 102, 166, 170, 249, 255, 415, 498, 503, 510, 830, 1006, 1245, 1411, 1509, 2490, 2515, 2822, 3018, 4233, 5030, 7055, 7545, 8466, 8551, 14110, 15090, 17102, 21165, 25653, 41749, 42330, 42755, 51306, 83498, 85510, 125247, 128265, 208745, 250494, 256530, 417490, 626235, 709733, 1252470, 1419466, 2129199, 3548665, 4258398, 7097330, 10645995, 21291990]

約数ペア:

[(1, 21291990), (2, 10645995), (3, 7097330), (5, 4258398), (6, 3548665), (10, 2129199), (15, 1419466), (17, 1252470), (30, 709733), (34, 626235), (51, 417490), (83, 256530), (85, 250494), (102, 208745), (166, 128265), (170, 125247), (249, 85510), (255, 83498), (415, 51306), (498, 42755), (503, 42330), (510, 41749), (830, 25653), (1006, 21165), (1245, 17102), (1411, 15090), (1509, 14110), (2490, 8551), (2515, 8466), (2822, 7545), (3018, 7055), (4233, 5030)]