21459700

素因数分解:

$2^2\times 5^2\times {\mathrm{53}}^1\times {\mathrm{4049}}^1$

素因数の和:4116

約数の個数: 36

約数和(自身を含む): 47457900

約数和(自身を除く): 25998200

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 53, 100, 106, 212, 265, 530, 1060, 1325, 2650, 4049, 5300, 8098, 16196, 20245, 40490, 80980, 101225, 202450, 214597, 404900, 429194, 858388, 1072985, 2145970, 4291940, 5364925, 10729850, 21459700]

約数ペア:

[(1, 21459700), (2, 10729850), (4, 5364925), (5, 4291940), (10, 2145970), (20, 1072985), (25, 858388), (50, 429194), (53, 404900), (100, 214597), (106, 202450), (212, 101225), (265, 80980), (530, 40490), (1060, 20245), (1325, 16196), (2650, 8098), (4049, 5300)]