640421280

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26161}}^1$

素因数の和:26199

約数の個数: 144

約数和(自身を含む): 2314081224

約数和(自身を除く): 1673659944

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 32, 34, 36, 40, 45, 48, 51, 60, 68, 72, 80, 85, 90, 96, 102, 120, 136, 144, 153, 160, 170, 180, 204, 240, 255, 272, 288, 306, 340, 360, 408, 480, 510, 544, 612, 680, 720, 765, 816, 1020, 1224, 1360, 1440, 1530, 1632, 2040, 2448, 2720, 3060, 4080, 4896, 6120, 8160, 12240, 24480, 26161, 52322, 78483, 104644, 130805, 156966, 209288, 235449, 261610, 313932, 392415, 418576, 444737, 470898, 523220, 627864, 784830, 837152, 889474, 941796, 1046440, 1177245, 1255728, 1334211, 1569660, 1778948, 1883592, 2092880, 2223685, 2354490, 2511456, 2668422, 3139320, 3557896, 3767184, 4002633, 4185760, 4447370, 4708980, 5336844, 6278640, 6671055, 7115792, 7534368, 8005266, 8894740, 9417960, 10673688, 12557280, 13342110, 14231584, 16010532, 17789480, 18835920, 20013165, 21347376, 26684220, 32021064, 35578960, 37671840, 40026330, 42694752, 53368440, 64042128, 71157920, 80052660, 106736880, 128084256, 160105320, 213473760, 320210640, 640421280]

約数ペア:

[(1, 640421280), (2, 320210640), (3, 213473760), (4, 160105320), (5, 128084256), (6, 106736880), (8, 80052660), (9, 71157920), (10, 64042128), (12, 53368440), (15, 42694752), (16, 40026330), (17, 37671840), (18, 35578960), (20, 32021064), (24, 26684220), (30, 21347376), (32, 20013165), (34, 18835920), (36, 17789480), (40, 16010532), (45, 14231584), (48, 13342110), (51, 12557280), (60, 10673688), (68, 9417960), (72, 8894740), (80, 8005266), (85, 7534368), (90, 7115792), (96, 6671055), (102, 6278640), (120, 5336844), (136, 4708980), (144, 4447370), (153, 4185760), (160, 4002633), (170, 3767184), (180, 3557896), (204, 3139320), (240, 2668422), (255, 2511456), (272, 2354490), (288, 2223685), (306, 2092880), (340, 1883592), (360, 1778948), (408, 1569660), (480, 1334211), (510, 1255728), (544, 1177245), (612, 1046440), (680, 941796), (720, 889474), (765, 837152), (816, 784830), (1020, 627864), (1224, 523220), (1360, 470898), (1440, 444737), (1530, 418576), (1632, 392415), (2040, 313932), (2448, 261610), (2720, 235449), (3060, 209288), (4080, 156966), (4896, 130805), (6120, 104644), (8160, 78483), (12240, 52322), (24480, 26161)]