28239320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{509}}^1$

素因数の和:612

約数の個数: 64

約数和(自身を含む): 67932000

約数和(自身を除く): 39692680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 73, 76, 95, 146, 152, 190, 292, 365, 380, 509, 584, 730, 760, 1018, 1387, 1460, 2036, 2545, 2774, 2920, 4072, 5090, 5548, 6935, 9671, 10180, 11096, 13870, 19342, 20360, 27740, 37157, 38684, 48355, 55480, 74314, 77368, 96710, 148628, 185785, 193420, 297256, 371570, 386840, 705983, 743140, 1411966, 1486280, 2823932, 3529915, 5647864, 7059830, 14119660, 28239320]

約数ペア:

[(1, 28239320), (2, 14119660), (4, 7059830), (5, 5647864), (8, 3529915), (10, 2823932), (19, 1486280), (20, 1411966), (38, 743140), (40, 705983), (73, 386840), (76, 371570), (95, 297256), (146, 193420), (152, 185785), (190, 148628), (292, 96710), (365, 77368), (380, 74314), (509, 55480), (584, 48355), (730, 38684), (760, 37157), (1018, 27740), (1387, 20360), (1460, 19342), (2036, 13870), (2545, 11096), (2774, 10180), (2920, 9671), (4072, 6935), (5090, 5548)]