21402225

素因数分解:

$3^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{271}}^1$

素因数の和:309

約数の個数: 72

約数和(自身を含む): 42969472

約数和(自身を除く): 21567247

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 81, 117, 135, 195, 225, 243, 271, 325, 351, 405, 585, 675, 813, 975, 1053, 1215, 1355, 1755, 2025, 2439, 2925, 3159, 3523, 4065, 5265, 6075, 6775, 7317, 8775, 10569, 12195, 15795, 17615, 20325, 21951, 26325, 31707, 36585, 52845, 60975, 65853, 78975, 88075, 95121, 109755, 158535, 182925, 264225, 285363, 329265, 475605, 548775, 792675, 856089, 1426815, 1646325, 2378025, 4280445, 7134075, 21402225]

約数ペア:

[(1, 21402225), (3, 7134075), (5, 4280445), (9, 2378025), (13, 1646325), (15, 1426815), (25, 856089), (27, 792675), (39, 548775), (45, 475605), (65, 329265), (75, 285363), (81, 264225), (117, 182925), (135, 158535), (195, 109755), (225, 95121), (243, 88075), (271, 78975), (325, 65853), (351, 60975), (405, 52845), (585, 36585), (675, 31707), (813, 26325), (975, 21951), (1053, 20325), (1215, 17615), (1355, 15795), (1755, 12195), (2025, 10569), (2439, 8775), (2925, 7317), (3159, 6775), (3523, 6075), (4065, 5265)]