20218596775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{62903}}^1$

素因数の和:62992

約数の個数: 48

約数和(自身を含む): 28829154816

約数和(自身を除く): 8610558041

約数列:

[1, 5, 13, 23, 25, 43, 65, 115, 215, 299, 325, 559, 575, 989, 1075, 1495, 2795, 4945, 7475, 12857, 13975, 24725, 62903, 64285, 314515, 321425, 817739, 1446769, 1572575, 2704829, 4088695, 7233845, 13524145, 18807997, 20443475, 35162777, 36169225, 62211067, 67620725, 94039985, 175813885, 311055335, 470199925, 808743871, 879069425, 1555276675, 4043719355, 20218596775]

約数ペア:

[(1, 20218596775), (5, 4043719355), (13, 1555276675), (23, 879069425), (25, 808743871), (43, 470199925), (65, 311055335), (115, 175813885), (215, 94039985), (299, 67620725), (325, 62211067), (559, 36169225), (575, 35162777), (989, 20443475), (1075, 18807997), (1495, 13524145), (2795, 7233845), (4945, 4088695), (7475, 2704829), (12857, 1572575), (13975, 1446769), (24725, 817739), (62903, 321425), (64285, 314515)]