20739225

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 16758375

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 89, 195, 239, 267, 325, 445, 717, 975, 1157, 1195, 1335, 2225, 3107, 3471, 3585, 5785, 5975, 6675, 9321, 15535, 17355, 17925, 21271, 28925, 46605, 63813, 77675, 86775, 106355, 233025, 276523, 319065, 531775, 829569, 1382615, 1595325, 4147845, 6913075, 20739225]

約数ペア:

[(1, 20739225), (3, 6913075), (5, 4147845), (13, 1595325), (15, 1382615), (25, 829569), (39, 531775), (65, 319065), (75, 276523), (89, 233025), (195, 106355), (239, 86775), (267, 77675), (325, 63813), (445, 46605), (717, 28925), (975, 21271), (1157, 17925), (1195, 17355), (1335, 15535), (2225, 9321), (3107, 6675), (3471, 5975), (3585, 5785)]