21939520

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:180

約数の個数: 112

約数和(自身を含む): 57332880

約数和(自身を除く): 35393360

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 37, 40, 64, 68, 74, 80, 85, 109, 136, 148, 160, 170, 185, 218, 272, 296, 320, 340, 370, 436, 544, 545, 592, 629, 680, 740, 872, 1088, 1090, 1184, 1258, 1360, 1480, 1744, 1853, 2180, 2368, 2516, 2720, 2960, 3145, 3488, 3706, 4033, 4360, 5032, 5440, 5920, 6290, 6976, 7412, 8066, 8720, 9265, 10064, 11840, 12580, 14824, 16132, 17440, 18530, 20128, 20165, 25160, 29648, 32264, 34880, 37060, 40256, 40330, 50320, 59296, 64528, 68561, 74120, 80660, 100640, 118592, 129056, 137122, 148240, 161320, 201280, 258112, 274244, 296480, 322640, 342805, 548488, 592960, 645280, 685610, 1096976, 1290560, 1371220, 2193952, 2742440, 4387904, 5484880, 10969760, 21939520]

約数ペア:

[(1, 21939520), (2, 10969760), (4, 5484880), (5, 4387904), (8, 2742440), (10, 2193952), (16, 1371220), (17, 1290560), (20, 1096976), (32, 685610), (34, 645280), (37, 592960), (40, 548488), (64, 342805), (68, 322640), (74, 296480), (80, 274244), (85, 258112), (109, 201280), (136, 161320), (148, 148240), (160, 137122), (170, 129056), (185, 118592), (218, 100640), (272, 80660), (296, 74120), (320, 68561), (340, 64528), (370, 59296), (436, 50320), (544, 40330), (545, 40256), (592, 37060), (629, 34880), (680, 32264), (740, 29648), (872, 25160), (1088, 20165), (1090, 20128), (1184, 18530), (1258, 17440), (1360, 16132), (1480, 14824), (1744, 12580), (1853, 11840), (2180, 10064), (2368, 9265), (2516, 8720), (2720, 8066), (2960, 7412), (3145, 6976), (3488, 6290), (3706, 5920), (4033, 5440), (4360, 5032)]