20899890

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:285

約数の個数: 128

約数和(自身を含む): 63037440

約数和(自身を除く): 42137550

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 27, 30, 31, 33, 45, 54, 55, 62, 66, 90, 93, 99, 110, 135, 155, 165, 186, 198, 227, 270, 279, 297, 310, 330, 341, 454, 465, 495, 558, 594, 681, 682, 837, 930, 990, 1023, 1135, 1362, 1395, 1485, 1674, 1705, 2043, 2046, 2270, 2497, 2790, 2970, 3069, 3405, 3410, 4086, 4185, 4994, 5115, 6129, 6138, 6810, 7037, 7491, 8370, 9207, 10215, 10230, 12258, 12485, 14074, 14982, 15345, 18414, 20430, 21111, 22473, 24970, 30645, 30690, 35185, 37455, 42222, 44946, 46035, 61290, 63333, 67419, 70370, 74910, 77407, 92070, 105555, 112365, 126666, 134838, 154814, 189999, 211110, 224730, 232221, 316665, 337095, 379998, 387035, 464442, 633330, 674190, 696663, 774070, 949995, 1161105, 1393326, 1899990, 2089989, 2322210, 3483315, 4179978, 6966630, 10449945, 20899890]

約数ペア:

[(1, 20899890), (2, 10449945), (3, 6966630), (5, 4179978), (6, 3483315), (9, 2322210), (10, 2089989), (11, 1899990), (15, 1393326), (18, 1161105), (22, 949995), (27, 774070), (30, 696663), (31, 674190), (33, 633330), (45, 464442), (54, 387035), (55, 379998), (62, 337095), (66, 316665), (90, 232221), (93, 224730), (99, 211110), (110, 189999), (135, 154814), (155, 134838), (165, 126666), (186, 112365), (198, 105555), (227, 92070), (270, 77407), (279, 74910), (297, 70370), (310, 67419), (330, 63333), (341, 61290), (454, 46035), (465, 44946), (495, 42222), (558, 37455), (594, 35185), (681, 30690), (682, 30645), (837, 24970), (930, 22473), (990, 21111), (1023, 20430), (1135, 18414), (1362, 15345), (1395, 14982), (1485, 14074), (1674, 12485), (1705, 12258), (2043, 10230), (2046, 10215), (2270, 9207), (2497, 8370), (2790, 7491), (2970, 7037), (3069, 6810), (3405, 6138), (3410, 6129), (4086, 5115), (4185, 4994)]