81212960

素因数分解:

$2^5\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:286

約数の個数: 96

約数和(自身を含む): 199955952

約数和(自身を除く): 118742992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 61, 80, 106, 122, 157, 160, 212, 244, 265, 305, 314, 424, 488, 530, 610, 628, 785, 848, 976, 1060, 1220, 1256, 1570, 1696, 1952, 2120, 2440, 2512, 3140, 3233, 4240, 4880, 5024, 6280, 6466, 8321, 8480, 9577, 9760, 12560, 12932, 16165, 16642, 19154, 25120, 25864, 32330, 33284, 38308, 41605, 47885, 51728, 64660, 66568, 76616, 83210, 95770, 103456, 129320, 133136, 153232, 166420, 191540, 258640, 266272, 306464, 332840, 383080, 507581, 517280, 665680, 766160, 1015162, 1331360, 1532320, 2030324, 2537905, 4060648, 5075810, 8121296, 10151620, 16242592, 20303240, 40606480, 81212960]

約数ペア:

[(1, 81212960), (2, 40606480), (4, 20303240), (5, 16242592), (8, 10151620), (10, 8121296), (16, 5075810), (20, 4060648), (32, 2537905), (40, 2030324), (53, 1532320), (61, 1331360), (80, 1015162), (106, 766160), (122, 665680), (157, 517280), (160, 507581), (212, 383080), (244, 332840), (265, 306464), (305, 266272), (314, 258640), (424, 191540), (488, 166420), (530, 153232), (610, 133136), (628, 129320), (785, 103456), (848, 95770), (976, 83210), (1060, 76616), (1220, 66568), (1256, 64660), (1570, 51728), (1696, 47885), (1952, 41605), (2120, 38308), (2440, 33284), (2512, 32330), (3140, 25864), (3233, 25120), (4240, 19154), (4880, 16642), (5024, 16165), (6280, 12932), (6466, 12560), (8321, 9760), (8480, 9577)]