20211191

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{331}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 27664896

約数和(自身を除く): 7453705

約数列:

[1, 7, 11, 13, 61, 77, 91, 143, 331, 427, 671, 793, 1001, 2317, 3641, 4303, 4697, 5551, 8723, 20191, 25487, 30121, 47333, 61061, 141337, 222101, 262483, 331331, 1554707, 1837381, 2887313, 20211191]

約数ペア:

[(1, 20211191), (7, 2887313), (11, 1837381), (13, 1554707), (61, 331331), (77, 262483), (91, 222101), (143, 141337), (331, 61061), (427, 47333), (671, 30121), (793, 25487), (1001, 20191), (2317, 8723), (3641, 5551), (4303, 4697)]