19681040

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 48203760

約数和(自身を除く): 28522720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 61, 74, 80, 109, 122, 148, 185, 218, 244, 296, 305, 370, 436, 488, 545, 592, 610, 740, 872, 976, 1090, 1220, 1480, 1744, 2180, 2257, 2440, 2960, 4033, 4360, 4514, 4880, 6649, 8066, 8720, 9028, 11285, 13298, 16132, 18056, 20165, 22570, 26596, 32264, 33245, 36112, 40330, 45140, 53192, 64528, 66490, 80660, 90280, 106384, 132980, 161320, 180560, 246013, 265960, 322640, 492026, 531920, 984052, 1230065, 1968104, 2460130, 3936208, 4920260, 9840520, 19681040]

約数ペア:

[(1, 19681040), (2, 9840520), (4, 4920260), (5, 3936208), (8, 2460130), (10, 1968104), (16, 1230065), (20, 984052), (37, 531920), (40, 492026), (61, 322640), (74, 265960), (80, 246013), (109, 180560), (122, 161320), (148, 132980), (185, 106384), (218, 90280), (244, 80660), (296, 66490), (305, 64528), (370, 53192), (436, 45140), (488, 40330), (545, 36112), (592, 33245), (610, 32264), (740, 26596), (872, 22570), (976, 20165), (1090, 18056), (1220, 16132), (1480, 13298), (1744, 11285), (2180, 9028), (2257, 8720), (2440, 8066), (2960, 6649), (4033, 4880), (4360, 4514)]