21707500

素因数分解:

$2^2\times 5^4\times {\mathrm{19}}^1\times {\mathrm{457}}^1$

素因数の和:500

約数の個数: 60

約数和(自身を含む): 50077720

約数和(自身を除く): 28370220

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 380, 457, 475, 500, 625, 914, 950, 1250, 1828, 1900, 2285, 2375, 2500, 4570, 4750, 8683, 9140, 9500, 11425, 11875, 17366, 22850, 23750, 34732, 43415, 45700, 47500, 57125, 86830, 114250, 173660, 217075, 228500, 285625, 434150, 571250, 868300, 1085375, 1142500, 2170750, 4341500, 5426875, 10853750, 21707500]

約数ペア:

[(1, 21707500), (2, 10853750), (4, 5426875), (5, 4341500), (10, 2170750), (19, 1142500), (20, 1085375), (25, 868300), (38, 571250), (50, 434150), (76, 285625), (95, 228500), (100, 217075), (125, 173660), (190, 114250), (250, 86830), (380, 57125), (457, 47500), (475, 45700), (500, 43415), (625, 34732), (914, 23750), (950, 22850), (1250, 17366), (1828, 11875), (1900, 11425), (2285, 9500), (2375, 9140), (2500, 8683), (4570, 4750)]