81935880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{991}}^1$

素因数の和:1071

約数の個数: 128

約数和(自身を含む): 269982720

約数和(自身を除く): 188046840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 53, 60, 65, 78, 104, 106, 120, 130, 156, 159, 195, 212, 260, 265, 312, 318, 390, 424, 520, 530, 636, 689, 780, 795, 991, 1060, 1272, 1378, 1560, 1590, 1982, 2067, 2120, 2756, 2973, 3180, 3445, 3964, 4134, 4955, 5512, 5946, 6360, 6890, 7928, 8268, 9910, 10335, 11892, 12883, 13780, 14865, 16536, 19820, 20670, 23784, 25766, 27560, 29730, 38649, 39640, 41340, 51532, 52523, 59460, 64415, 77298, 82680, 103064, 105046, 118920, 128830, 154596, 157569, 193245, 210092, 257660, 262615, 309192, 315138, 386490, 420184, 515320, 525230, 630276, 682799, 772980, 787845, 1050460, 1260552, 1365598, 1545960, 1575690, 2048397, 2100920, 2731196, 3151380, 3413995, 4096794, 5462392, 6302760, 6827990, 8193588, 10241985, 13655980, 16387176, 20483970, 27311960, 40967940, 81935880]

約数ペア:

[(1, 81935880), (2, 40967940), (3, 27311960), (4, 20483970), (5, 16387176), (6, 13655980), (8, 10241985), (10, 8193588), (12, 6827990), (13, 6302760), (15, 5462392), (20, 4096794), (24, 3413995), (26, 3151380), (30, 2731196), (39, 2100920), (40, 2048397), (52, 1575690), (53, 1545960), (60, 1365598), (65, 1260552), (78, 1050460), (104, 787845), (106, 772980), (120, 682799), (130, 630276), (156, 525230), (159, 515320), (195, 420184), (212, 386490), (260, 315138), (265, 309192), (312, 262615), (318, 257660), (390, 210092), (424, 193245), (520, 157569), (530, 154596), (636, 128830), (689, 118920), (780, 105046), (795, 103064), (991, 82680), (1060, 77298), (1272, 64415), (1378, 59460), (1560, 52523), (1590, 51532), (1982, 41340), (2067, 39640), (2120, 38649), (2756, 29730), (2973, 27560), (3180, 25766), (3445, 23784), (3964, 20670), (4134, 19820), (4955, 16536), (5512, 14865), (5946, 13780), (6360, 12883), (6890, 11892), (7928, 10335), (8268, 9910)]