28205880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:261

約数の個数: 128

約数和(自身を含む): 90720000

約数和(自身を除く): 62514120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 76, 89, 95, 114, 120, 139, 152, 178, 190, 228, 267, 278, 285, 356, 380, 417, 445, 456, 534, 556, 570, 695, 712, 760, 834, 890, 1068, 1112, 1140, 1335, 1390, 1668, 1691, 1780, 2085, 2136, 2280, 2641, 2670, 2780, 3336, 3382, 3560, 4170, 5073, 5282, 5340, 5560, 6764, 7923, 8340, 8455, 10146, 10564, 10680, 12371, 13205, 13528, 15846, 16680, 16910, 20292, 21128, 24742, 25365, 26410, 31692, 33820, 37113, 39615, 40584, 49484, 50730, 52820, 61855, 63384, 67640, 74226, 79230, 98968, 101460, 105640, 123710, 148452, 158460, 185565, 202920, 235049, 247420, 296904, 316920, 371130, 470098, 494840, 705147, 742260, 940196, 1175245, 1410294, 1484520, 1880392, 2350490, 2820588, 3525735, 4700980, 5641176, 7051470, 9401960, 14102940, 28205880]

約数ペア:

[(1, 28205880), (2, 14102940), (3, 9401960), (4, 7051470), (5, 5641176), (6, 4700980), (8, 3525735), (10, 2820588), (12, 2350490), (15, 1880392), (19, 1484520), (20, 1410294), (24, 1175245), (30, 940196), (38, 742260), (40, 705147), (57, 494840), (60, 470098), (76, 371130), (89, 316920), (95, 296904), (114, 247420), (120, 235049), (139, 202920), (152, 185565), (178, 158460), (190, 148452), (228, 123710), (267, 105640), (278, 101460), (285, 98968), (356, 79230), (380, 74226), (417, 67640), (445, 63384), (456, 61855), (534, 52820), (556, 50730), (570, 49484), (695, 40584), (712, 39615), (760, 37113), (834, 33820), (890, 31692), (1068, 26410), (1112, 25365), (1140, 24742), (1335, 21128), (1390, 20292), (1668, 16910), (1691, 16680), (1780, 15846), (2085, 13528), (2136, 13205), (2280, 12371), (2641, 10680), (2670, 10564), (2780, 10146), (3336, 8455), (3382, 8340), (3560, 7923), (4170, 6764), (5073, 5560), (5282, 5340)]