28380820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6421}}^1$

素因数の和:6460

約数の個数: 48

約数和(自身を含む): 67970448

約数和(自身を除く): 39589628

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 6421, 12842, 25684, 32105, 64210, 83473, 109157, 128420, 166946, 218314, 333892, 417365, 436628, 545785, 834730, 1091570, 1419041, 1669460, 2183140, 2838082, 5676164, 7095205, 14190410, 28380820]

約数ペア:

[(1, 28380820), (2, 14190410), (4, 7095205), (5, 5676164), (10, 2838082), (13, 2183140), (17, 1669460), (20, 1419041), (26, 1091570), (34, 834730), (52, 545785), (65, 436628), (68, 417365), (85, 333892), (130, 218314), (170, 166946), (221, 128420), (260, 109157), (340, 83473), (442, 64210), (884, 32105), (1105, 25684), (2210, 12842), (4420, 6421)]