28457820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:244

約数の個数: 144

約数和(自身を含む): 93169440

約数和(自身を除く): 64711620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 53, 57, 60, 76, 90, 95, 106, 114, 157, 159, 171, 180, 190, 212, 228, 265, 285, 314, 318, 342, 380, 471, 477, 530, 570, 628, 636, 684, 785, 795, 855, 942, 954, 1007, 1060, 1140, 1413, 1570, 1590, 1710, 1884, 1908, 2014, 2355, 2385, 2826, 2983, 3021, 3140, 3180, 3420, 4028, 4710, 4770, 5035, 5652, 5966, 6042, 7065, 8321, 8949, 9063, 9420, 9540, 10070, 11932, 12084, 14130, 14915, 15105, 16642, 17898, 18126, 20140, 24963, 26847, 28260, 29830, 30210, 33284, 35796, 36252, 41605, 44745, 45315, 49926, 53694, 59660, 60420, 74889, 83210, 89490, 90630, 99852, 107388, 124815, 134235, 149778, 158099, 166420, 178980, 181260, 249630, 268470, 299556, 316198, 374445, 474297, 499260, 536940, 632396, 748890, 790495, 948594, 1422891, 1497780, 1580990, 1897188, 2371485, 2845782, 3161980, 4742970, 5691564, 7114455, 9485940, 14228910, 28457820]

約数ペア:

[(1, 28457820), (2, 14228910), (3, 9485940), (4, 7114455), (5, 5691564), (6, 4742970), (9, 3161980), (10, 2845782), (12, 2371485), (15, 1897188), (18, 1580990), (19, 1497780), (20, 1422891), (30, 948594), (36, 790495), (38, 748890), (45, 632396), (53, 536940), (57, 499260), (60, 474297), (76, 374445), (90, 316198), (95, 299556), (106, 268470), (114, 249630), (157, 181260), (159, 178980), (171, 166420), (180, 158099), (190, 149778), (212, 134235), (228, 124815), (265, 107388), (285, 99852), (314, 90630), (318, 89490), (342, 83210), (380, 74889), (471, 60420), (477, 59660), (530, 53694), (570, 49926), (628, 45315), (636, 44745), (684, 41605), (785, 36252), (795, 35796), (855, 33284), (942, 30210), (954, 29830), (1007, 28260), (1060, 26847), (1140, 24963), (1413, 20140), (1570, 18126), (1590, 17898), (1710, 16642), (1884, 15105), (1908, 14915), (2014, 14130), (2355, 12084), (2385, 11932), (2826, 10070), (2983, 9540), (3021, 9420), (3140, 9063), (3180, 8949), (3420, 8321), (4028, 7065), (4710, 6042), (4770, 5966), (5035, 5652)]