19905480

素因数分解:

$2^3\times 3^3\times 5^1\times 7^1\times {\mathrm{2633}}^1$

素因数の和:2660

約数の個数: 128

約数和(自身を含む): 75859200

約数和(自身を除く): 55953720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 54, 56, 60, 63, 70, 72, 84, 90, 105, 108, 120, 126, 135, 140, 168, 180, 189, 210, 216, 252, 270, 280, 315, 360, 378, 420, 504, 540, 630, 756, 840, 945, 1080, 1260, 1512, 1890, 2520, 2633, 3780, 5266, 7560, 7899, 10532, 13165, 15798, 18431, 21064, 23697, 26330, 31596, 36862, 39495, 47394, 52660, 55293, 63192, 71091, 73724, 78990, 92155, 94788, 105320, 110586, 118485, 142182, 147448, 157980, 165879, 184310, 189576, 221172, 236970, 276465, 284364, 315960, 331758, 355455, 368620, 442344, 473940, 497637, 552930, 568728, 663516, 710910, 737240, 829395, 947880, 995274, 1105860, 1327032, 1421820, 1658790, 1990548, 2211720, 2488185, 2843640, 3317580, 3981096, 4976370, 6635160, 9952740, 19905480]

約数ペア:

[(1, 19905480), (2, 9952740), (3, 6635160), (4, 4976370), (5, 3981096), (6, 3317580), (7, 2843640), (8, 2488185), (9, 2211720), (10, 1990548), (12, 1658790), (14, 1421820), (15, 1327032), (18, 1105860), (20, 995274), (21, 947880), (24, 829395), (27, 737240), (28, 710910), (30, 663516), (35, 568728), (36, 552930), (40, 497637), (42, 473940), (45, 442344), (54, 368620), (56, 355455), (60, 331758), (63, 315960), (70, 284364), (72, 276465), (84, 236970), (90, 221172), (105, 189576), (108, 184310), (120, 165879), (126, 157980), (135, 147448), (140, 142182), (168, 118485), (180, 110586), (189, 105320), (210, 94788), (216, 92155), (252, 78990), (270, 73724), (280, 71091), (315, 63192), (360, 55293), (378, 52660), (420, 47394), (504, 39495), (540, 36862), (630, 31596), (756, 26330), (840, 23697), (945, 21064), (1080, 18431), (1260, 15798), (1512, 13165), (1890, 10532), (2520, 7899), (2633, 7560), (3780, 5266)]