213777740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:495

約数の個数: 96

約数和(自身を含む): 520128000

約数和(自身を除く): 306350260

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 199, 209, 220, 257, 380, 398, 418, 514, 796, 836, 995, 1028, 1045, 1285, 1990, 2090, 2189, 2570, 2827, 3781, 3980, 4180, 4378, 4883, 5140, 5654, 7562, 8756, 9766, 10945, 11308, 14135, 15124, 18905, 19532, 21890, 24415, 28270, 37810, 41591, 43780, 48830, 51143, 53713, 56540, 75620, 83182, 97660, 102286, 107426, 166364, 204572, 207955, 214852, 255715, 268565, 415910, 511430, 537130, 562573, 831820, 971717, 1022860, 1074260, 1125146, 1943434, 2250292, 2812865, 3886868, 4858585, 5625730, 9717170, 10688887, 11251460, 19434340, 21377774, 42755548, 53444435, 106888870, 213777740]

約数ペア:

[(1, 213777740), (2, 106888870), (4, 53444435), (5, 42755548), (10, 21377774), (11, 19434340), (19, 11251460), (20, 10688887), (22, 9717170), (38, 5625730), (44, 4858585), (55, 3886868), (76, 2812865), (95, 2250292), (110, 1943434), (190, 1125146), (199, 1074260), (209, 1022860), (220, 971717), (257, 831820), (380, 562573), (398, 537130), (418, 511430), (514, 415910), (796, 268565), (836, 255715), (995, 214852), (1028, 207955), (1045, 204572), (1285, 166364), (1990, 107426), (2090, 102286), (2189, 97660), (2570, 83182), (2827, 75620), (3781, 56540), (3980, 53713), (4180, 51143), (4378, 48830), (4883, 43780), (5140, 41591), (5654, 37810), (7562, 28270), (8756, 24415), (9766, 21890), (10945, 19532), (11308, 18905), (14135, 15124)]