81871380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{647}}^1$

素因数の和:718

約数の個数: 144

約数和(自身を含む): 268894080

約数和(自身を除く): 187022700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 37, 38, 45, 57, 60, 74, 76, 90, 95, 111, 114, 148, 171, 180, 185, 190, 222, 228, 285, 333, 342, 370, 380, 444, 555, 570, 647, 666, 684, 703, 740, 855, 1110, 1140, 1294, 1332, 1406, 1665, 1710, 1941, 2109, 2220, 2588, 2812, 3235, 3330, 3420, 3515, 3882, 4218, 5823, 6327, 6470, 6660, 7030, 7764, 8436, 9705, 10545, 11646, 12293, 12654, 12940, 14060, 19410, 21090, 23292, 23939, 24586, 25308, 29115, 31635, 36879, 38820, 42180, 47878, 49172, 58230, 61465, 63270, 71817, 73758, 95756, 110637, 116460, 119695, 122930, 126540, 143634, 147516, 184395, 215451, 221274, 239390, 245860, 287268, 359085, 368790, 430902, 442548, 454841, 478780, 553185, 718170, 737580, 861804, 909682, 1077255, 1106370, 1364523, 1436340, 1819364, 2154510, 2212740, 2274205, 2729046, 4093569, 4309020, 4548410, 5458092, 6822615, 8187138, 9096820, 13645230, 16374276, 20467845, 27290460, 40935690, 81871380]

約数ペア:

[(1, 81871380), (2, 40935690), (3, 27290460), (4, 20467845), (5, 16374276), (6, 13645230), (9, 9096820), (10, 8187138), (12, 6822615), (15, 5458092), (18, 4548410), (19, 4309020), (20, 4093569), (30, 2729046), (36, 2274205), (37, 2212740), (38, 2154510), (45, 1819364), (57, 1436340), (60, 1364523), (74, 1106370), (76, 1077255), (90, 909682), (95, 861804), (111, 737580), (114, 718170), (148, 553185), (171, 478780), (180, 454841), (185, 442548), (190, 430902), (222, 368790), (228, 359085), (285, 287268), (333, 245860), (342, 239390), (370, 221274), (380, 215451), (444, 184395), (555, 147516), (570, 143634), (647, 126540), (666, 122930), (684, 119695), (703, 116460), (740, 110637), (855, 95756), (1110, 73758), (1140, 71817), (1294, 63270), (1332, 61465), (1406, 58230), (1665, 49172), (1710, 47878), (1941, 42180), (2109, 38820), (2220, 36879), (2588, 31635), (2812, 29115), (3235, 25308), (3330, 24586), (3420, 23939), (3515, 23292), (3882, 21090), (4218, 19410), (5823, 14060), (6327, 12940), (6470, 12654), (6660, 12293), (7030, 11646), (7764, 10545), (8436, 9705)]