21997515

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{829}}^1$

素因数の和:927

約数の個数: 32

約数和(自身を含む): 37051200

約数和(自身を除く): 15053685

約数列:

[1, 3, 5, 15, 29, 61, 87, 145, 183, 305, 435, 829, 915, 1769, 2487, 4145, 5307, 8845, 12435, 24041, 26535, 50569, 72123, 120205, 151707, 252845, 360615, 758535, 1466501, 4399503, 7332505, 21997515]

約数ペア:

[(1, 21997515), (3, 7332505), (5, 4399503), (15, 1466501), (29, 758535), (61, 360615), (87, 252845), (145, 151707), (183, 120205), (305, 72123), (435, 50569), (829, 26535), (915, 24041), (1769, 12435), (2487, 8845), (4145, 5307)]