20745795

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 39997440

約数和(自身を除く): 19251645

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 61, 79, 105, 123, 183, 205, 237, 287, 305, 395, 427, 553, 615, 861, 915, 1185, 1281, 1435, 1659, 2135, 2501, 2765, 3239, 4305, 4819, 6405, 7503, 8295, 9717, 12505, 14457, 16195, 17507, 22673, 24095, 33733, 37515, 48585, 52521, 68019, 72285, 87535, 101199, 113365, 168665, 197579, 262605, 340095, 505995, 592737, 987895, 1383053, 2963685, 4149159, 6915265, 20745795]

約数ペア:

[(1, 20745795), (3, 6915265), (5, 4149159), (7, 2963685), (15, 1383053), (21, 987895), (35, 592737), (41, 505995), (61, 340095), (79, 262605), (105, 197579), (123, 168665), (183, 113365), (205, 101199), (237, 87535), (287, 72285), (305, 68019), (395, 52521), (427, 48585), (553, 37515), (615, 33733), (861, 24095), (915, 22673), (1185, 17507), (1281, 16195), (1435, 14457), (1659, 12505), (2135, 9717), (2501, 8295), (2765, 7503), (3239, 6405), (4305, 4819)]