21429225

素因数分解:

$3^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{599}}^1$

素因数の和:671

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 18746775

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 53, 75, 135, 159, 225, 265, 477, 599, 675, 795, 1325, 1431, 1797, 2385, 2995, 3975, 5391, 7155, 8985, 11925, 14975, 16173, 26955, 31747, 35775, 44925, 80865, 95241, 134775, 158735, 285723, 404325, 476205, 793675, 857169, 1428615, 2381025, 4285845, 7143075, 21429225]

約数ペア:

[(1, 21429225), (3, 7143075), (5, 4285845), (9, 2381025), (15, 1428615), (25, 857169), (27, 793675), (45, 476205), (53, 404325), (75, 285723), (135, 158735), (159, 134775), (225, 95241), (265, 80865), (477, 44925), (599, 35775), (675, 31747), (795, 26955), (1325, 16173), (1431, 14975), (1797, 11925), (2385, 8985), (2995, 7155), (3975, 5391)]