20921745

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3461}}^1$

素因数の和:3513

約数の個数: 32

約数和(自身を含む): 37223424

約数和(自身を除く): 16301679

約数列:

[1, 3, 5, 13, 15, 31, 39, 65, 93, 155, 195, 403, 465, 1209, 2015, 3461, 6045, 10383, 17305, 44993, 51915, 107291, 134979, 224965, 321873, 536455, 674895, 1394783, 1609365, 4184349, 6973915, 20921745]

約数ペア:

[(1, 20921745), (3, 6973915), (5, 4184349), (13, 1609365), (15, 1394783), (31, 674895), (39, 536455), (65, 321873), (93, 224965), (155, 134979), (195, 107291), (403, 51915), (465, 44993), (1209, 17305), (2015, 10383), (3461, 6045)]