21000398536

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{1301}}^1\times {\mathrm{155209}}^1$

素因数の和:156529

約数の個数: 32

約数和(自身を含む): 42437518200

約数和(自身を除く): 21437119664

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 1301, 2602, 5204, 10408, 16913, 33826, 67652, 135304, 155209, 310418, 620836, 1241672, 2017717, 4035434, 8070868, 16141736, 201926909, 403853818, 807707636, 1615415272, 2625049817, 5250099634, 10500199268, 21000398536]

約数ペア:

[(1, 21000398536), (2, 10500199268), (4, 5250099634), (8, 2625049817), (13, 1615415272), (26, 807707636), (52, 403853818), (104, 201926909), (1301, 16141736), (2602, 8070868), (5204, 4035434), (10408, 2017717), (16913, 1241672), (33826, 620836), (67652, 310418), (135304, 155209)]