20989542

素因数分解:

$2^1\times 3^1\times 7^4\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:111

約数の個数: 80

約数和(自身を含む): 51628032

約数和(自身を除く): 30638490

約数列:

[1, 2, 3, 6, 7, 14, 21, 31, 42, 47, 49, 62, 93, 94, 98, 141, 147, 186, 217, 282, 294, 329, 343, 434, 651, 658, 686, 987, 1029, 1302, 1457, 1519, 1974, 2058, 2303, 2401, 2914, 3038, 4371, 4557, 4606, 4802, 6909, 7203, 8742, 9114, 10199, 10633, 13818, 14406, 16121, 20398, 21266, 30597, 31899, 32242, 48363, 61194, 63798, 71393, 74431, 96726, 112847, 142786, 148862, 214179, 223293, 225694, 338541, 428358, 446586, 499751, 677082, 999502, 1499253, 2998506, 3498257, 6996514, 10494771, 20989542]

約数ペア:

[(1, 20989542), (2, 10494771), (3, 6996514), (6, 3498257), (7, 2998506), (14, 1499253), (21, 999502), (31, 677082), (42, 499751), (47, 446586), (49, 428358), (62, 338541), (93, 225694), (94, 223293), (98, 214179), (141, 148862), (147, 142786), (186, 112847), (217, 96726), (282, 74431), (294, 71393), (329, 63798), (343, 61194), (434, 48363), (651, 32242), (658, 31899), (686, 30597), (987, 21266), (1029, 20398), (1302, 16121), (1457, 14406), (1519, 13818), (1974, 10633), (2058, 10199), (2303, 9114), (2401, 8742), (2914, 7203), (3038, 6909), (4371, 4802), (4557, 4606)]