19808460

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:300

約数の個数: 144

約数和(自身を含む): 69888000

約数和(自身を除く): 50079540

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 79, 84, 90, 105, 126, 140, 158, 180, 199, 210, 237, 252, 315, 316, 395, 398, 420, 474, 553, 597, 630, 711, 790, 796, 948, 995, 1106, 1185, 1194, 1260, 1393, 1422, 1580, 1659, 1791, 1990, 2212, 2370, 2388, 2765, 2786, 2844, 2985, 3318, 3555, 3582, 3980, 4179, 4740, 4977, 5530, 5572, 5970, 6636, 6965, 7110, 7164, 8295, 8358, 8955, 9954, 11060, 11940, 12537, 13930, 14220, 15721, 16590, 16716, 17910, 19908, 20895, 24885, 25074, 27860, 31442, 33180, 35820, 41790, 47163, 49770, 50148, 62685, 62884, 78605, 83580, 94326, 99540, 110047, 125370, 141489, 157210, 188652, 220094, 235815, 250740, 282978, 314420, 330141, 440188, 471630, 550235, 565956, 660282, 707445, 943260, 990423, 1100470, 1320564, 1414890, 1650705, 1980846, 2200940, 2829780, 3301410, 3961692, 4952115, 6602820, 9904230, 19808460]

約数ペア:

[(1, 19808460), (2, 9904230), (3, 6602820), (4, 4952115), (5, 3961692), (6, 3301410), (7, 2829780), (9, 2200940), (10, 1980846), (12, 1650705), (14, 1414890), (15, 1320564), (18, 1100470), (20, 990423), (21, 943260), (28, 707445), (30, 660282), (35, 565956), (36, 550235), (42, 471630), (45, 440188), (60, 330141), (63, 314420), (70, 282978), (79, 250740), (84, 235815), (90, 220094), (105, 188652), (126, 157210), (140, 141489), (158, 125370), (180, 110047), (199, 99540), (210, 94326), (237, 83580), (252, 78605), (315, 62884), (316, 62685), (395, 50148), (398, 49770), (420, 47163), (474, 41790), (553, 35820), (597, 33180), (630, 31442), (711, 27860), (790, 25074), (796, 24885), (948, 20895), (995, 19908), (1106, 17910), (1185, 16716), (1194, 16590), (1260, 15721), (1393, 14220), (1422, 13930), (1580, 12537), (1659, 11940), (1791, 11060), (1990, 9954), (2212, 8955), (2370, 8358), (2388, 8295), (2765, 7164), (2786, 7110), (2844, 6965), (2985, 6636), (3318, 5970), (3555, 5572), (3582, 5530), (3980, 4977), (4179, 4740)]