21398715

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:253

約数の個数: 64

約数和(自身を含む): 41731200

約数和(自身を除く): 20332485

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 89, 117, 135, 137, 195, 267, 351, 411, 445, 585, 685, 801, 1157, 1233, 1335, 1755, 1781, 2055, 2403, 3471, 3699, 4005, 5343, 5785, 6165, 8905, 10413, 12015, 12193, 16029, 17355, 18495, 26715, 31239, 36579, 48087, 52065, 60965, 80145, 109737, 156195, 158509, 182895, 240435, 329211, 475527, 548685, 792545, 1426581, 1646055, 2377635, 4279743, 7132905, 21398715]

約数ペア:

[(1, 21398715), (3, 7132905), (5, 4279743), (9, 2377635), (13, 1646055), (15, 1426581), (27, 792545), (39, 548685), (45, 475527), (65, 329211), (89, 240435), (117, 182895), (135, 158509), (137, 156195), (195, 109737), (267, 80145), (351, 60965), (411, 52065), (445, 48087), (585, 36579), (685, 31239), (801, 26715), (1157, 18495), (1233, 17355), (1335, 16029), (1755, 12193), (1781, 12015), (2055, 10413), (2403, 8905), (3471, 6165), (3699, 5785), (4005, 5343)]