19994520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1831}}^1$

素因数の和:1865

約数の個数: 128

約数和(自身を含む): 73866240

約数和(自身を除く): 53871720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 1831, 2184, 2730, 3640, 3662, 5460, 5493, 7324, 9155, 10920, 10986, 12817, 14648, 18310, 21972, 23803, 25634, 27465, 36620, 38451, 43944, 47606, 51268, 54930, 64085, 71409, 73240, 76902, 95212, 102536, 109860, 119015, 128170, 142818, 153804, 166621, 190424, 192255, 219720, 238030, 256340, 285636, 307608, 333242, 357045, 384510, 476060, 499863, 512680, 571272, 666484, 714090, 769020, 833105, 952120, 999726, 1332968, 1428180, 1538040, 1666210, 1999452, 2499315, 2856360, 3332420, 3998904, 4998630, 6664840, 9997260, 19994520]

約数ペア:

[(1, 19994520), (2, 9997260), (3, 6664840), (4, 4998630), (5, 3998904), (6, 3332420), (7, 2856360), (8, 2499315), (10, 1999452), (12, 1666210), (13, 1538040), (14, 1428180), (15, 1332968), (20, 999726), (21, 952120), (24, 833105), (26, 769020), (28, 714090), (30, 666484), (35, 571272), (39, 512680), (40, 499863), (42, 476060), (52, 384510), (56, 357045), (60, 333242), (65, 307608), (70, 285636), (78, 256340), (84, 238030), (91, 219720), (104, 192255), (105, 190424), (120, 166621), (130, 153804), (140, 142818), (156, 128170), (168, 119015), (182, 109860), (195, 102536), (210, 95212), (260, 76902), (273, 73240), (280, 71409), (312, 64085), (364, 54930), (390, 51268), (420, 47606), (455, 43944), (520, 38451), (546, 36620), (728, 27465), (780, 25634), (840, 23803), (910, 21972), (1092, 18310), (1365, 14648), (1560, 12817), (1820, 10986), (1831, 10920), (2184, 9155), (2730, 7324), (3640, 5493), (3662, 5460)]