21000983925

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{106753}}^1$

素因数の和:106870

約数の個数: 48

約数和(自身を含む): 36111889088

約数和(自身を除く): 15110905163

約数列:

[1, 3, 5, 15, 25, 43, 61, 75, 129, 183, 215, 305, 645, 915, 1075, 1525, 2623, 3225, 4575, 7869, 13115, 39345, 65575, 106753, 196725, 320259, 533765, 1601295, 2668825, 4590379, 6511933, 8006475, 13771137, 19535799, 22951895, 32559665, 68855685, 97678995, 114759475, 162798325, 280013119, 344278425, 488394975, 840039357, 1400065595, 4200196785, 7000327975, 21000983925]

約数ペア:

[(1, 21000983925), (3, 7000327975), (5, 4200196785), (15, 1400065595), (25, 840039357), (43, 488394975), (61, 344278425), (75, 280013119), (129, 162798325), (183, 114759475), (215, 97678995), (305, 68855685), (645, 32559665), (915, 22951895), (1075, 19535799), (1525, 13771137), (2623, 8006475), (3225, 6511933), (4575, 4590379), (7869, 2668825), (13115, 1601295), (39345, 533765), (65575, 320259), (106753, 196725)]